Bde.DBTables.TUpdateSQL.DeleteSQL
Delphi
property DeleteSQL: TStrings index 2 read GetSQLIndex write SetSQLIndex;
C++
__property System::Classes::TStrings* DeleteSQL = {read=GetSQLIndex, write=SetSQLIndex, index=2};
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| property | published | Bde.DBTables.pas Bde.DBTables.hpp |
Bde.DBTables | TUpdateSQL |
Description
Specifies the SQL DELETE statement to use when applying a cached deletion of a record.
Set DeleteSQL to the SQL DELETE statement to use when applying a deletion to a record. Statements can be parameterized queries. To create a DELETE statement at design time, use the UpdateSQL editor to create statements, such as:
DELETE FROM "Country.db" WHERE Name = :OLD_Name
At run time, an application can write a statement directly to this property to set or change the DELETE statement.
Note: As the example illustrates, DeleteSQL supports an extension to normal parameter binding. To retrieve the value of a field as it exists prior to application of cached updates, the field name with 'OLD_'. This is especially useful when doing field comparisons in the WHERE clause of the statement.