Question

I have a query :

 SELECT 
   MAX(date), 
   logId,
   computerId
 FROM 
   logTable
 WHERE logId IN ('1','2','3')

But I want the IN clause test the computerId too like this :

logId = ‘1’ and computerId = ‘998874’,

logId = ‘2’ and computerId = ‘334211’,
…

How to do this ?

Answer 1

You would have to replace the INstatement with multiple ORstatements

 SELECT  MAX(date)
        ,  logId
        , computerId
 FROM   logTable
 WHERE  (logId = '1' AND computerid = '998874')
        OR (logId = '2' AND computerid = '334211')

Alternatively, if you have many conditions, it might be more readable to create an in-memory table for them and join on these conditions

;WITH Conditions (logID, computerid) AS (
  SELECT '1', '998874'
  UNION ALL SELECT '2', '334211'
)
SELECT  MAX(date)
        ,  logId
        , computerId
FROM   logTable lt
       INNER JOIN Conditions c ON c.logID = lt.LogID 
                                  AND c.computerid = lt.computerID