Question

I have a query like this:

SELECT TOP 1 ID, DATA, OTHERINF FROM MYTABLE WHERE DATE = @DATE

and after reading the row data and using it I want to update that retrieved row and change one of it’s columns (in another transaction).

But as you see here i searched for that row twice. Is there any way that I keep remember the row and do the update without searching again.

Thank you.

Answer 1

I know its out of vogue but you can also do positioned updates on cursors
e.g.

use Northwind
GO



DECLARE EMP_CURSOR CURSOR 
FOR SELECT TOP 1 EmployeeID, LastName FROM EMPLOYEES WHERE  HireDate = '1994-11-15'
FOR UPDATE OF LastName

OPEN EMP_CURSOR

FETCH NEXT FROM EMP_CURSOR 

UPDATE EMPLOYEES
SET LastName = LastName + CAST(DatePart(ms,GetDate()) as char(3))
WHERE CURRENT OF EMP_CURSOR


CLOSE EMP_CURSOR

DEALLOCATE  EMP_CURSOR