SELECT dan UPDATE tabel sehingga tidak ada Utas yang tumpang tindih

Jika yang Anda maksud adalah penguncian jenis antrean aman konkurensi, lalu gunakan petunjuk ROWLOCK, UPDLOCK, READPAST?

Kondisi Balap Antrian Proses SQL Server

BEGIN TRAN

SELECT TOP 1 @QueryID = [ID] from Table WITH (ROWLOCK, UPDLOCK, READPAST)
UPDATE Table SET [Read] = 1 WHERE [ID] = @QueryID 

COMMIT TRAN -- TRAM

Namun, dalam satu pernyataan. sesuatu seperti

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;