[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'SQLDB' (#fcl)

# TSQLQuery.DeleteSQL

Statement to be used when deleting a new row in the database

## Declaration

Source position: sqldb.pp line 700

`published property TSQLQuery.DeleteSQL : TStringList;`

## Description

DeleteSQL can be used to specify an SQL DELETE statement, which is used when an existing record was deleted from the dataset, and the changes must be written to the database. TSQLQuery can generate a delete statement by itself for many cases, but in case it fails, the statement to be used for the delete operation can be specified here.

The SQL statement should be parameterized according to the conventions for specifying parameters. Note that old field values can be specified as :OLD_FIELDNAME

## See also

TSQLQuery.SQL |  | The SQL statement to execute
TSQLQuery.UpdateSQL |  | Statement to be used when updating an existing row in the database
TSQLQuery.DeleteSQL |  | Statement to be used when deleting a new row in the database
TSQLQuery.UpdateMode |  | How to create update SQL statements.
UsingParams |  | Using parameters
UpdateSQLS |  | Automatic generation of update SQL statements