Pokud máte na mysli souběžné bezpečné zamykání fronty, použijte rady ROWLOCK, UPDLOCK, READPAST?
Podmínka závodu ve frontě procesů serveru SQL
BEGIN TRAN
SELECT TOP 1 @QueryID = [ID] from Table WITH (ROWLOCK, UPDLOCK, READPAST)
UPDATE Table SET [Read] = 1 WHERE [ID] = @QueryID
COMMIT TRAN -- TRAM
Nicméně v jednom prohlášení. něco jako
WITH T AS
(
--ORDER BY with TOP , or perhaps MIN is better?
SELECT TOP 1 [Read], [ID] from Table
WITH (ROWLOCK, UPDLOCK, READPAST) ORDER BY [Read]
)
UPDATE
T
SET
[Read] = 1;