DBDelete

DBDelete deletes selected rows from a database table. (This function is equivalent to a SQL DELETE statement.)

Syntax

DBDelete(strDBConn, strTable, strCondition, "optStrErrorTag")

strDBConn

The name of the database connection. Connections are configured in the Database/ERP folder, in the Project Explorer. For more information, see Database/ERP worksheet.

strTable

The name of the table in the database.

strCondition

A string specifying which rows of the table to select. This is equivalent to the SQL WHERE clause, and the string should follow the same syntax.

Tip: To delete all rows in the table, make the condition statement a single space (" ").

optStrErrorTag

The name of a project tag that will receive detailed error messages, if errors occur during project run time.

Note: If this parameter is enclosed in quotes, the string literal will be used. Otherwise, the value of the tag/expression will be used.

This parameter is optional.

Return value

In the case of success, this function returns the number of rows that were deleted from the database table.

In the case of error, this function returns one of the following possible values:

Notes

Database/ERP functions emulate Structured Query Language (SQL) database operations. Before you use these functions, familiarize yourself with how SQL statements are formed and executed.

This function recognizes only 16000 rows of a table at one time. If a selected section of table has more than 16000 rows, only the first 16000 rows of the selection will be accessible to any built-in language Database/ERP functions. Exceeding this limit may return an EOF error even if the end of the file has not been reached.

You can use the Database Gateway (StADOSvr) to directly monitor database connections for leaks and errors. For more information, see Database Interface.

Examples

As used in a Math worksheet: