BREAK exits the current WHILE loop. If the current WHILE loop is nested inside another, BREAK exits only the current loop, and control is given to the next statement in the outer loop.
BREAK is usually inside an IF statement.
WHILE (1=1) BEGIN IF EXISTS (SELECT * FROM ##MyTempTable WHERE EventCode = 'Done') BEGIN BREAK; -- 'Done' row has finally been inserted and detected, so end this loop. END PRINT N'The other process is not yet done.'; -- Re-confirm the non-done status to the console. WAITFOR DELAY '00:01:30'; -- Sleep for 90 seconds. END