sqlnaive
SSCoach
Points: 17435
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May 2, 2013 at 1:58 am
#1611815
Very good question. Too good to clarfy many doubts all in one. Woul dlove to see many such questions. :-):-):-)
Dazli
SSC Veteran
Points: 235
December 18, 2013 at 7:45 pm
#1674685
For the last one, it's counting NULL. I think that's why it returns 0.
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