T-SQL获取唯一键列的所有记录，该唯一键列包含另一个列值

Question

Hope I can describe it well. I have a table called TruckAuftragworkflow where I have a column called TruckAppId and a column called TaskId . I want to get all TruckAppId from that table where the TaskId!=35 but TaskId=31 OR TaskId=32.

I tried that and failed:

select count(*) AnzahlTasks, TruckAppId from TruckAuftragWorkFlow
GROUP BY TruckAppId
HAVING TaskId != 35 and TaskId in (31,32)

Maybe I have a knot in my head but it seems not that easy to build such query (for me!).

Answer 1

Count your conditions with an aggregate function

select count(*) AnzahlTasks, TruckAppId from TruckAuftragWorkFlow
GROUP BY TruckAppId
HAVING SUM(CASE WHEN TaskId = 35 THEN 1 ELSE 0 END) = 0 
   AND SUM(CASE WHEN TaskId in (31,32) THEN 1 ELSE 0 END) > 0