Question

I have a stored procedure to get the data I want:

SELECT  a.SONum, a.Seq1, a.SptNum, a.Qty1, a.SalUniPriP, a.PayNum, a.InvNum, 
    a.BLNum, c.ETD, c.ShpNum,  f.IssBan
FROM OrdD a JOIN OrdH b ON a.SONum = b.SONum  
    LEFT JOIN Invh c ON a.InvNum = c.InvNum 
    LEFT JOIN cus d ON b.CusCod = d.CusCod  
    LEFT JOIN BL e ON a.BLNum = e.BLNum
    LEFT JOIN PayMasH f ON f.PayNum = a.PayNum
    LEFT JOIN Shipment g ON g.ShpNum = c.ShpNum  
WHERE b.CusCod IN (SELECT CusCod FROM UsrInc WHERE UseID=@UserID and UseLev=@UserLvl) 
    AND d.CusGrp = @CusGrp

After I get those records into cursor, I used ROWLOCK, UPDLOCK to lock all the related invoice numbers.

SELECT InvNum FROM Invh WITH (ROWLOCK,UPDLOCK) WHERE InvNum =

Can I issue locking on the table INVH at the point I select the table from a few table using join command at my store procedure?

Any advice, please!

Answer 1

Yes, you can, provided you format your SQL correctly. The general pattern you require is as follows:

BEGIN TRAN

SELECT    *
FROM      table_1 AS t1 {WITH (UPDLOCK, ROWLOCK)}
JOIN      table_2 AS t2 {WITH (UPDLOCK, ROWLOCK)}
ON        t1.a = t2.a

COMMIT TRAN   -- locking ends here

Where {} is optional (omit the {}). So lock as you put the "WITH (UPDLOCK, ROWLOCK)" clause on each table you wish to lock, it will work.

So you can put the lock where you want it, as per your question.