Some developers include naming conventions for windows, procedures, functions, menu pads, and other objects. Because these names cannot be used outside their very restricted context, there is less likelihood of confusion. However, the "Naming Objects" section later in this chapter provides possible guidelines for these objects as well.
Using this naming convention requires that a variable have a two-character prefix. The first prefix character always denotes the scope and the second denotes the type. Although you could define these characters in reverse order, you should never switch the order of these characters after you start an application. If you do, the resulting confusion will make you wish that you never heard of naming conventions-and it will not make you popular with other programmers who need to read your code, if they follow the standard prefix order.
Because naming conventions are optional, many variations exist. To some extent, this situation is good because experimentation sometimes leads to better methods. Many leading FoxPro developers have developed their own naming conventions over the years, some of which are better than others. At this writing, it is too early to determine whether these conventions will be abandoned for a common naming convention. Actually, global acceptance would be a surprise.
Part of the problem is that the naming convention proposed for FoxPro is not completely consistent with other development languages yet. Another problem is that Visual FoxPro does not fully support cases in all the places where variables and field names appear. Finally, developers might use naming conventions for different purposes.
On the other hand, any naming convention probably is better than no naming convention, as long as it is strictly followed within the application. Despite the recommendation that you use uppercase and lowercase, the Visual FoxPro Table Designer supports only lowercase. In Windows 95, the first button shows a horizontal bar across the bottom of the icon.
Pressing this button minimizes the application and docks it in the taskbar at the bottom of the screen. Visual FoxPro continues running when it is minimized.
If you want to restore a minimized application, click its name in the taskbar. In Windows 95, the second button in this group toggles between two buttons: Maximize and Restore. The button used to maximize the Visual FoxPro desktop or the current window looks like a single window; the Restore button looks like two cascaded windows.
Windows 95 also has a separate Close button on the right side of each window. Clicking this button, which contains an X, closes Visual FoxPro or the current window when you are in application windows. Clicking this button closes the object. The potential danger is that these controls often appear immediately below FoxPro's main Close button.
Thus, you can easily click the wrong Close button. As a developer, you will find that restarting VFP after making this mistake several times during a session is a major annoyance. Then, at the beginning of each session, type the following command to activate the accidental exit protection:. FPW file as a startup command, as follows:. The main menu bar appears on the second screen line of FoxPro's desktop.
In many ways, this menu bar is like the tip of an iceberg. Each option in the menu, called a menu pad, displays a menu pop-up when you click it. A menu pop-up usually contains two or more menu options. Although a pop-up can have a single option, a better practice associates single actions with the menu pad directly. You can select menu pads and their options in several ways. The most obvious method employs the mouse to click them.
Pressing F10 activates the menu and highlights the first pad, File. You might have noticed that each menu pad has one underlined letter. You can open that menu's pop-up directly by pressing the Alt key along with the underlined letter. With any menu pop-up open, use the left- or right-arrow key to move to other pads. The up- and down-arrow keys open the current pad's pop-up list and move through its options.
In any given pop-up, some menu options might appear dimmed, which means that you cannot execute that option now. Usually, common sense tells you why the option is inappropriate. If you open the File pop-up before opening a table, database, program, or other file, for example, you cannot choose Save because you have nothing to save yet.
Therefore, FoxPro automatically dims the Save option text. While a pop-up is open, pressing the up- or down-arrow key moves the highlight from one option to the next. Pressing the left- or right-arrow key moves to the next menu pad and opens its menu pop-up-unless the highlighted option contains a right arrow along its right border, in which case pressing the right-arrow key opens a submenu that lists additional options.
To choose a menu item, highlight it and press Enter. A mouse click works just as well. You can even press the underlined letter in the option, if it has one.
Notice that in the pop-up menus, you do not press the Alt key with the underlined letter. Some menu options have special key combinations, called shortcut keys, that enable you to jump to that option directly without going through the menu pads.
FoxPro displays these shortcut keys along the right side of the pop-up menus. Shortcut keys are defined through Visual FoxPro's system or main menu. You can override or even replace this menu with your own menu, however, when you create custom applications.
If VFP's System menu or any individual menu pad is not active, these shortcut keys are not active, either. A visual clue that has become a Windows-application standard is the use of an ellipsis … at the end of a menu option to indicate that selecting the option opens a dialog box with additional options. Choosing File, Open, for example, does not tell FoxPro what to open.
Therefore, when you select this option, Visual FoxPro displays its standard Open dialog box. Menu options without ellipses such as File, Close execute immediately when they are selected. A similar standard uses the right arrow to indicate that the option opens another menu level, as in Tools, Wizards. The File Menu Options The File menu pop-up list contains options related to accessing files creating new files, opening existing ones, closing, saving, and printing.
The options in this dialog box enable you to create new projects, databases, tables, queries, connections, views, remote views, forms, reports, labels, programs, classes, text files, and menus. Open Opens the Open dialog box, which opens any file type listed under New. Close Closes the active window. If you press Shift and open the File menu, this option becomes Close All, which closes all open windows.
Save Saves the file in the active window with its current name. For a new file that has no name, the option prompts the user for a filename. Save As Prompts the user for a new filename before saving the file.
Save As Class Saves the current form or selected controls as a class definition active only from within the Form Designer. Revert Cancels changes made in the current file during the current editing session.
Import Imports a Visual FoxPro file or a file formatted by another application. You can also use this option to start the Import Wizard. Export Exports a Visual FoxPro file in another application's file format. Page Setup Changes the page layout and printer settings for reports. Page Preview Displays pages in a window as they will appear when printed. Send Enables you to send email. Exit Exits Visual FoxPro. The Edit Menu Options The options in the Edit menu provide functions that are used for editing programs, forms, and reports.
This menu also contains options that create object linking and embedding OLE objects. Changes made before the last save, even if made during the same session, are not reversible.
Redo Performs a reversed change again. Cut Removes the selected text or object from current document and places it on the Clipboard.
Copy Makes a copy of the selected text or object and places it on the Clipboard. Paste Copies the current contents of the Clipboard to the current insertion point. You can embed objects or merely link them. Visual FoxPro stores a copy of embedded objects in the current object.
When an object is linked, FoxPro stores a path and name reference to the original object only. Clear Removes selected text without copying it to the Clipboard. Select All Selects all objects in the current window. This option is used often in form and report design to move or format all objects at the same time. Find Displays the Find dialog box, which is used to locate text strings in files.
Find options include the capability to ignore case, wrap around lines, match entire words, and search forward or backward. Find Again Repeats the last Find starting at the current insertion point position rather than the beginning of the document. Replace Displays the Replace dialog box, which is used to locate and replace text strings in files.
Go to Line Used primarily during debugging to go to a specific line number in a program file. This option cannot be used when word wrap is on. Of course, you don't have word wrap on when you edit your FoxPro programs-right?
Insert Object Similar to Paste Special, except that it does not assume that the object already exists and is stored on the Clipboard.
The option embeds objects in general type fields. After creating the object in the other application, Insert Object returns to Visual FoxPro and inserts the linked or embedded object.
Object Provides options for editing a selected OLE object. Links Opens linked files OLE and enables you to edit the link. Properties Displays the Edit Properties dialog box, which enables you to affect the behavior, appearance, and save options of the edit windows.
Several options from Table 1. The rest of the options apply to editing programs and fields. The Edit Properties dialog box, opened by choosing the last option in the Edit menu, gives you control over the editor's many properties. The behavior properties, for example, turn on and off drag-and-drop editing, word wrap, and automatic indent.
Unless you are using Visual FoxPro editor as a word processor, I do not recommend using word wrap. Finally, you can have VFP make a backup copy of the file when you edit it, compile the file when it is saved, save line feeds, and create an end-of-file marker. The View Menu Options The View menu displays options that are appropriate for viewing the current table, if one is open. If you are not currently viewing a file, the menu displays a single option Toolbar that opens the Toolbar dialog box, which lists the available toolbars used by Visual FoxPro 6.
On the other hand, if you already are browsing a table or editing a form, menu, or report, additional options appear as described in Table 1. The option displays fields vertically, and a horizontal line separates records if grid lines are active.
Browse Changes to a Browse layout style for viewing and changing records. The option displays fields horizontally; rows represent records and columns represent fields. Append Mode Appends a blank record to the end of the table and moves the record pointer to the first field in it. Tab Order Enables you to set the tab order in forms. Preview Shows a preview of labels or reports onscreen.
Data Environment Defines tables and relations used in a form, form set, or report. Properties Displays the Properties dialog box for forms and controls. Code Opens the code windows when you are editing object methods. Report Controls Toolbar Displays the Report Controls toolbar, which enables you to add controls to a report. Layout Toolbar Opens the Layout toolbar, which helps you align controls.
Color Palette Toolbar Opens the Color Palette toolbar, which enables you to select foreground and background colors for a control. Report Preview Toolbar Provides buttons that move between pages of the preview, change the zoom factor, print the report, and exit preview mode.
Database Designer Opens the Database Designer, which maintains tables, views, and relationships stored in a database. Table Designer Opens the Table Designer, which enables you to make structure modifications to associated and free tables and to their indexes.
Grid Lines Toggles the display of grid lines on and off. Show Position Displays the position, height, and width of the selected object or form in the status bar. General Options Adds code in a menu when you are using the Menu Designer. Menu Options Adds code to specific menu options. Toolbars Displays a dialog box that lists every toolbar used by FoxPro, enabling you to customize the buttons in toolbars and to create your own. The Format Menu Options The Format menu normally consists of options that control font characteristics, text indentation, and spacing.
Additional options become available, however, when you are using the various Designers, and are described in Table 1. Enlarge Font Enlarges the font used in the current window. Reduce Font Reduces the font size used in the current window. Single Space Single-spaces the text in the current window. Double Space Double-spaces the text in the current window. Indent Indents the current or selected lines in the current window. Unindent Removes the indent of the current or selected lines in the current window.
Comment Comments out the selected lines. Uncomment Removes comments from the selected lines. Align Opens options that align selected objects. Size Opens options that size selected objects. Horizontal Spacing Provides options that adjust horizontal spacing between selected objects.
Vertical Spacing Provides options that adjust vertical spacing between selected objects. Bring to Front Moves the selected object to the top of the objects in a form. Send to Back Moves the selected object to the back of the objects in a form. Group Associates a selection of objects in reports and enables you to work with them as a group.
Ungroup Breaks a group definition into individual objects again. Snap to Grid When you are moving objects, repositions the top-left corner to the nearest grid intersection when the mouse button is released.
Set Grid Scale Determines how far apart the vertical and horizontal grids are. Text Alignment Aligns text in the selected object. Fill Defines a fill pattern for shapes. Pen Defines a pen thickness and style for shapes.
Mode Defines whether the background of an object is opaque or transparent. Choosing the Font option opens a dialog box that displays a list of available fonts, their styles, and sizes. The option also displays a small sample of the font in a preview window. The font list contains all fonts that are defined in Windows. Fonts that have TT before their names are TrueType fonts, which can print over a large range of font sizes and still look good. If you are editing a program file, fonts preceded by a blank are either screen or printer fonts.
These fonts look good onscreen, but they have to be sent to the printer as bitmap images which print slowly or they use a similar font for printing. I recommend the use of TrueType fonts. You can also control some additional effects in reports, such as Strikeout, Underline, and Color.
Unless you have shareware fonts that permit distribution, keep in mind that many fonts cannot be distributed freely. If your application uses a font that other computers do not have, formatted screens and reports may not come out as planned. Check your current Windows manual to verify this list. NOTE When you use the Enlarge Font or Reduce Font option, Visual FoxPro attempts to use font sizes stored in the font file, but it can calculate other font sizes based on multiples of existing font sizes or combinations of them.
Visual FoxPro can create a point font from information in the 6- and 8-point fonts, for example. The option indents the line by the equivalent of one tab position each time you choose it. You can set the number of characters represented by a tab position through the Properties dialog box Edit menu. The Unindent option removes the equivalent of one tab from the current or selected lines each time you choose it. Only if the selected lines begin with these characters will Uncomment remove the comment characters.
The Tools Menu Options The Tools menu provides a variety of programmer tools, ranging from wizards to the debugger. Spelling Primarily spell-checks text fields and memos. Macros Defines and maintains keyboard macros. Class Browser Examines the contents of any class to view its properties and methods or even the actual code used to create the object. Beautify Reformats program files to add indenting and capitalization. Debugger Opens the Debugger window. This improved replacement for the Debug and Trace window adds windows for watch variables, locals, call stack, and the capability to track events and analyze coverage during testing.
Options Provides access to Visual FoxPro configuration options. A wizard uses a series of windows that ask questions about the object that is being created. Visual FoxPro also includes a spelling checker, which you can use to check the spelling of any object's text beginning at the current location of the insertion point.
Although you can use this feature to spell-check program listings, that is not the intent. Instead, use the spelling checker to spell-check long text and memo fields. The Macro dialog box enables you to create, edit, and view macro definitions. A macro definition consists of a series of Visual FoxPro commands that you can store and execute with a single keystroke.
Previously FoxPro provided eight default macro definitions, which are assigned to function keys F2 through F9. F4 DIR Lists all tables in the current directory. If an index is also open, F6 displays its expression. The key also shows the settings of SET commands and other system information. F7 also shows the definitions of all menus, pads, pop-up lists, and windows.
F9 Enters append mode for the current table. In addition to these eight macros, you can define your own. The last option in the Tools menu is Options, which displays a multiple-page form that provides controls to customize the way you work with Visual FoxPro. These groups are covered in more detail in the section "Setting Configuration Options" later in this chapter.
The Program Menu Options The Program menu consists of six options that are related to compiling and running a program. Cancel Cancels the current program. Resume Resumes the current program from a suspended state. Suspend Stops the current program from executing but does not remove it from memory.
Compile Translates a source file into object code. Run Runs the current program. The option appears in the menu as Do, followed by the name of the PRG. The Do command opens a dialog box that enables you to select the program that you want to run. You can also execute a program from the Command window; enter DO immediately followed by the name of the program that you want to run. You do not have to compile a program before running it; you can run a PRG directly. VFP can compile the program automatically before running it.
Subsequent new program files inherit this property, but it does not affect existing PRG files. To change those files to automatically compile on saving, you must set the property, open, and resave the files. Choose Program, Do, and select the program from the Do dialog box, which is similar to the Open dialog box. The Do option differs from the Run option which appears in the menu as Do, followed by the name of the PRG , which executes the program in the current window.
VFP enables the Cancel option only when you are executing a program. To access this option, you must suspend the program or be stepping through it in the Trace window. NOTE After suspending a program, you cannot edit the source code until you cancel the program. Visual FoxPro enables Resume only while an executing program is suspended. The option resumes a suspended program to normal execution mode.
To suspend a program, you first need to interrupt it. You can do this while you are using the Trace window to step through the program. You can interrupt a program by inserting breakpoints into the code, using the Trace window, or setting break conditions on variables or expressions. The Compile option opens a window similar to the Open dialog box, enabling you to select a source file. The option takes the selected program source file PRG and compiles it.
In addition, the menu enables you to bring to the front any window that is currently open. Hide Hides the active window but does not remove it from memory. Show All Displays all defined windows.
Clear Clears text from the application workspace or current output window. Cycle Moves from one open window to the next, making the next window the active one. Menu Option Description Command Window Makes the Command window active and brings it to the top, opening it if necessary. Data Session Makes the Data Session window active and brings it to the top, opening it if necessary. This window serves as a valuable tool for monitoring which tables are open in each of the 32, work areas.
If more than nine windows have been defined, a final option-More Windows- appears. To change focus to any window, simply click its name. The Arrange All option resizes open windows to create non-overlapping tiles. Arrange All will not resize a maximized window. With two open windows, it splits the screen in half vertically and puts the active window on the left side.
With three open windows, it also splits the screen in half vertically, putting the active window on the left side. The option then splits the right half horizontally, however, to display the other two open windows. If you have four open windows, each window receives one-quarter of the screen; the active window is placed in the upper-left corner.
For more windows, you'll have to experiment. The Hide option removes the active window from the screen. You cannot redisplay a system window such as an edit window for a program without reissuing the command that created it. If you hide the current output window, it continues to receive output even while it is hidden, which means that you cannot see it.
Upon redisplaying the window, you again see anything that has been written to it. TIP Take advantage of the capability to write to a window while it is hidden to draw complex screens. Rather than amuse the user with a light show as your program paints a screen, hide the window, add the objects to it, and show the window fully developed.
The Clear option erases text from the current screen or active window. Notice that when you use the SHOW WINDOW command after hiding a window, that window does not automatically become the active window; its status depends on whether it was the active window when it was hidden and whether you activated another window in the meantime. Therefore, be careful about what you clear.
The Data Session option opens the Data Session dialog box, which displays a list of all tables that are open in the current session. The option also displays any relations defined among these tables, as shown in Figure 1.
In the middle of the Data Session dialog box is a set of six buttons. The Properties button opens a window that displays the current table properties, indicating the data-buffering options that are in effect and any data filter or index order. The window also enables you to determine whether to allow access to all fields in the work area or only to fields selected with a field filter.
If you can open the table exclusively, you can change the structure by clicking the Modify button. This button opens the Table Designer shown in Figure 1. This option enables you to change not only the fields for the selected table, but also the properties of those fields captions, validations, defaults, and so on. You can also add, delete, or modify index expressions from the Indexes page of the Table Designer.
The indexes defined here are part of the structural compound index for the current table. Finally, you can select the Table page to set record validations and triggers. NDX extensions. The program can read. NDX indexes from earlier database systems, but it immediately converts them to its own internal index format, even though it may retain the.
NDX extension. If you need to create a standalone index. To open a table in a new work area, click the Open button in the Data Session dialog box. The view remains part of the database, but its current set of data is dropped. You can control the number of rows Visual FoxPro progressively fetches at one time from the host database with the FetchSize property of the view and active view cursor.
You can use the delayed memo fetching feature to speed retrieval of view data. When you choose delayed memo fetching, Visual FoxPro does not retrieve the contents of a Memo field until you choose to open and display the field. However, you don t have to set the SendUpdates or Updatable properties to on in order to make delayed memo fetching work. You can control the amount of data downloaded when you open a view by setting the MaxRecords property.
When Visual FoxPro sends a SQL statement to the data source to create a view, the data source builds and stores a result set. The MaxRecords property specifies the maximum number of rows fetched from the remote result set into your view. The default setting is 1, which downloads all rows in the result set. To control the number of rows downloaded into a view From the Tools menu, choose Options and select the Remote Data tab; then in the Remote view defaults area, next to the Maximum records to fetch box, clear All , enter a value in the text box, and then choose OK.
For example, the following code alters the view definition to limit the number of rows downloaded into the view to 50, regardless of the size of the result set built on the remote data source:. Tip You can t use the MaxRecords property to stop a runaway query, because the MaxRecords property doesn t control the building of the result set. Use the QueryTimeOut property to control the execution time on the remote data source.
To make optimization decisions for a view or query, you might need to know the execution plan: the order that joins and filter clauses will be evaluated. Using the SYS function, you can display one of three Rushmore optimization levels. The three levels indicate the degree to which the filter conditions or join conditions were able to use Rushmore optimization. The levels are completely Full , partially Partial or not at all None.
For example, you might type:. If the execution plan for your joins does not match your specific needs, you can force your join order to execute exactly as written without optimization from the processor. Be sure that the order in which the join tables appear is exactly the order in which they should be joined. You can also use parentheses to control the evaluation order of joins. In this example, the first join specified is also the first join evaluated.
The Customer table is joined with the Orders table first. The result of that join is then joined with the OrdItems table:. In this example, the join within the parentheses for the table Orders and OrdItems is evaluated first. The result of that join is then used in the evaluation of the join with Customers :. You can use one active connection as the information pipeline for multiple remote views by sharing a connection.
When you share an active connection, you:. You share connections by setting the view definition to use a shared connection upon activation. When the view is used, Visual FoxPro connects to the remote data source using the existing shared connection if any. If a shared connection isn t in use, Visual FoxPro creates a unique connection when the view is opened, which can then be shared with other views. Only one active instance of a named connection definition is shared during a Visual FoxPro session.
If multiple instances of the same connection definition are active, the first instance to be used as a shared connection becomes the designated shared connection. All views that use that connection definition and employ connection sharing will access the remote server through the designated shared connection. Connections other than the designated shared connection are not shared. Connection sharing is not scoped to sessions. The following code creates a view that, when activated with the USE command, shares a connection:.
When a connection is busy, such as when Visual FoxPro is progressively fetching data into a cursor, you don t want to start another fetch or send updates on the same connection.
You can determine whether a connection is busy with the ConnectBusy property, which returns a value of true. You can use this property in your application to test a connection before sending a request over a shared connection to a remote data source.
The following code identifies a connection handle and then uses the connection handle to test whether the connection is busy:. Previous page. Table of content. Next page. Creating a Multitable View To access related information that is stored in separate tables, you can create a view and add two or more tables, or you can modify an existing view by adding tables. Defining and Modifying Join Conditions Typically, to define a join condition, you use the relationships established on the primary and foreign key fields between the tables.
To change the results of the view to meet your specific needs, you can specify: Fields in the join Comparison operators between the fields A sequence of joins, if you have two tables in your view The type of join Specifying joins on fields other than the primary and foreign keys can be useful in specific instances, but are not used in most views.
You can modify the join types in your view using the View Designer or the language. Including Non-Matching Records in Results If you want to include non-matching rows in your results, you can use an outer join.
To Use Return only records from both tables that match the comparison condition set between the two fields in the join condition. Inner join Return all records from the table to the left of the JOIN keyword and only matching records from the table to the right of the keyword. Left outer join Return all records from the table to the right of the JOIN keyword and only matching records from the table to the left of the keyword.
Right outer join Return matching and non-matching records from both tables Full outer join Defining Multiple Join Conditions If you create views or queries with more than two tables, you can change the results by the order your join conditions are specified. Defining a Connection In Visual FoxPro, you can create and store a named connection definition in a database, which you can then refer to by name when you create a remote view.
Displaying ODBC Login Prompts When you use a view whose connection login information is not fully specified, Visual FoxPro might display a data source-specific box that prompts you for the missing information. Using an Existing Connection You can use an existing named connection to create a remote view.
Using Views After you ve created a view, you can use the view to display and update data. You treat a view like a table: Open the view with the USE command and include the name of the view.
Close the view with the USE command. Display view records in a Browse window. Display open view aliases in the Data Session window. Use the view as a data source, such as in a text or Grid control, form, or report. You can use a view through the Project Manager or the language.
Data Session window displays the view and its base table When a view is based on remote tables, the base tables are not opened in work areas. Limiting the Scope of a View When you access a remote data source, you re accessing potentially massive amounts of data.
Creating a Parameterized View You can limit the scope of a view without creating a separate view for each subset of records by creating a parameterized view.
View displaying records whose country matches the supplied parameter Tip If your parameter is an expression, enclose the parameter expression in parentheses. Prompting for User Input of a Parameter Value If your parameter is not a variable or expression, you might want to prompt the user to supply the parameter value by using a quoted string as your view parameter. Opening Multiple Instances of a View You can open multiple instances of a view in separate work areas, just as you can open a table in more than one work area.
Setting View and Connection Properties When you create a view, the view inherits property settings, such as UpdateType and UseMemoSize, from the environment cursor, or cursor 0 of the current session. Closing a View s Base Tables The local base tables opened automatically when you use a view are not automatically closed when you close a view; you must explicitly close them.
Updating Data in a View You update data in a view just as you would update data in a table. These properties are listed here with their default settings: View Update Properties and Default Settings View Property Default Setting Tables Includes all tables that have updatable fields and have at least one primary key field. KeyField Database key fields and remote primary keys on the table. Updatable All fields except the primary key fields. SendUpdates Defaults to the session default, which is originally set to false.
CompareMemo Defaults to true. The following example lists the steps you would follow to specify the five view update properties programmatically: Note The default View properties may supply all the information needed to update your view.
Set the Tables property with at least one table name. Set the KeyField property with one or more local Visual FoxPro field names that together define a unique key for the update table. Map the view fields to their base table fields with the UpdateName property.
This property is particularly useful when your view is based on a join of two tables with a common field name, or when the fields are aliased in the view.
To update the desired base table, you map the Visual FoxPro view field name to the base table field and table name.
Specify the scope of fields you want to update with the Updatable property. You should specify only those fields also specified with the UpdateName property. Set the SendUpdates property to true. This is the master switch that instructs Visual FoxPro to create and send updates to any of the tables and fields you ve specified as updatable.
Updating Multiple Tables in a View You can update multiple base tables from a view. Set a single-field unique key for the Employee table. Set a two-field unique key for the Customer table. Set the updatable fields. Typically, key fields are not updatable. Activate the update functionality. Customizing Views with the Data Dictionary Because views are stored in a database, you can create: Captions Comments for the view and view fields Default values for view fields Field- and row-level rules and rule error messages The data dictionary features for views are similar in function to their counterparts for database tables.
Creating Default Values for View Fields Like default values for table fields, view field default values are stored in the database and are available each time you use the view. Creating Rules on View Fields and Rows You can create local versions of remote data source rules to: Reduce response time. Reduce impact on network resources. Test data before sending it to the remote data source.
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