user397316 user397316 - 4 months ago 9
SQL Question

NOT IN condition in SQL

Can anyone tell me the exact syntax for NOT IN condition in SQL on two columns.

This is my query written in VBA.

strNewSql = "SELECT distinct(tblRevRelLog_Detail.PartNumber), tblRevRelLog_Detail.ChangeLevel, tblRevRelLog_Detail.ID FROM tblRevRelLog_Detail LEFT JOIN tblEventLog ON tblRevRelLog_Detail.PartNumber = tblEventLog.PartNumber"

strNewSql = strNewSql & " WHERE (tblEventLog.PartNumber) Not In(SELECT tblEventLog.PartNumber FROM tblEventLog WHERE tblEventLog.EventTypeSelected = 'pn REMOVED From Wrapper') AND tblEventLog.TrackingNumber = """ & tempTrackingNumber & """ AND tblEventLog.TrackingNumber = tblRevRelLog_Detail.RevRelTrackingNumber;"


I want to change this sub query like, it should apply on the combination of two columns as follows:

strNewSql = "SELECT tblRevRelLog_Detail.PartNumber, tblRevRelLog_Detail.ChangeLevel, tblRevRelLog_Detail.ID FROM tblRevRelLog_Detail LEFT JOIN tblEventLog ON tblRevRelLog_Detail.PartNumber = tblEventLog.PartNumber"

strNewSql = strNewSql & " WHERE (((tblEventLog.PartNumber, tblEventLog.PartNumberChgLvl) Not In(SELECT tblEventLog.PartNumber,tblEventLog.PartNumberChgLvl FROM tblEventLog WHERE tblEventLog.EventTypeSelected = 'pn REMOVED From Wrapper') AND tblEventLog.TrackingNumber = """ & tempTrackingNumber & """ AND tblEventLog.TrackingNumber = tblRevRelLog_Detail.RevRelTrackingNumber);"


But this is not working.....

Answer

You can't use IN with more than one column but you can usually achieve the same effect using EXISTS:

SELECT *
FROM tbl1
WHERE NOT EXISTS
(
    SELECT *
    FROM tbl2
    WHERE tbl2.col1 = tbl1.col1
        AND tbl2.col2 = tbl1.col2
)