Deleting Rows in Result Sets
The ADO, OLE DB, and ODBC APIs support deleting the current row on which an application is positioned in a result set. The application executes a statement, and then fetches rows from the result set. After an application has fetched the row, it can use the following functions or methods to delete the row:
ADO applications use the Delete method of the Recordset object.
OLE DB applications use the DeleteRows method of the IRowsetChange interface.
ODBC applications use the SQLSetPos function with the SQL_DELETE option.
DB-library applications use dbcursor to perform a CRS_DELETE operation.
Transact-SQL scripts, stored procedures, and triggers can use the WHERE CURRENT OF clause on a DELETE statement to delete the cursor row on which they currently are positioned. The following example deletes a single row from the
EmployeePayHistory table using a cursor named
DELETE affects only the single row currently fetched from the cursor.
USE AdventureWorks; GO DECLARE complex_cursor CURSOR FOR SELECT a.EmployeeID FROM HumanResources.EmployeePayHistory AS a WHERE RateChangeDate <> (SELECT MAX(RateChangeDate) FROM HumanResources.EmployeePayHistory AS b WHERE a.EmployeeID = b.EmployeeID) ; OPEN complex_cursor; FETCH FROM complex_cursor; DELETE FROM HumanResources.EmployeePayHistory WHERE CURRENT OF complex_cursor; CLOSE complex_cursor; DEALLOCATE complex_cursor; GO