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thanks a lot for your explanation. I'm a beginner ,so I can't quite understand:
C.TOTALCNT NOT IN (
SELECT TOTALCNT FROM COUNTS AS T
WHERE H.HACKER_ID != T.HACKER_ID)
does this mean for every H.HACKER_ID, we SELECT all the numbers of different H.HACKER_ID? and this process will be executed for the number of H.HACKER_ID times in total?
so exhausting...
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thanks a lot for your explanation. I'm a beginner ,so I can't quite understand: C.TOTALCNT NOT IN ( SELECT TOTALCNT FROM COUNTS AS T WHERE H.HACKER_ID != T.HACKER_ID) does this mean for every H.HACKER_ID, we SELECT all the numbers of different H.HACKER_ID? and this process will be executed for the number of H.HACKER_ID times in total? so exhausting...