Borl; Delphi Database Application Developer's Guide by Borl, Delphi

By Borl, Delphi

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Borland in a table where the key fields are LastName, FirstName, and MiddleInital. ', mtInformation, [mbOK], 0); end; 42 Database Application Developer’s Guide For more information For more information about • Searching for field values, see page 70. • Using the Fields Editor, see page 30. • Using the Database Form Expert, see page 21. Validating data entry This section describes ways to make sure the user doesn’t enter invalid data into tables. There are three different approaches to validating data: table-based, field-based, and record-based.

For more information For more information about • Formatting fields, see page 85. • Editing display properties, see page 83. Chapter 2, Building a sample database application: MASTAPP 41 • Using the Fields Editor, see page 30. • Using the Database Form Expert, see page 21. • Setting a TField component’s properties, see page 79. Searching for field values This example shows how to search for values in keyed (indexed) fields in a table. To search for values in unkeyed fields, use a query. See “Using queries and ranges” on page 47 for more information.

SQL statements can be either static or dynamic; that is, they can be fixed or include parameters where values are provided at run time. ” What to do (static query) This example shows how to create and execute a static query and display the results in a form. 1 Use Form Expert to build a form based on a query of the Customer table (for detailed instructions, see page 21). Use only the CustNo, Company, and State fields (for simplicity). Specify a grid layout. 2 Use the Object Inspector to set the TQuery component’s Active property to True.

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