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以下哪个SQL会导致无法应用owner列上的索引。A、Select * from t1 where owner = ‘abcd’; B、Select * from t1 where owner <>'abcd'; C、Select * from t1 where owner not in(‘abcd’); D、Select * from t1 where not (owner = ‘abcd’)
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理解问题以下哪个SQL会导致无法应用owner列上的索引。A、Select * from t1 where owner = ‘abcd’; B、Select * from t1 where owner <>'abcd'; C、Select * from t1 where owner not in(‘abcd’); D、Select * from t1 where not (owner = ‘abcd’)
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以下哪个SQL会导致无法应用owner列上的索引。A、Select * from t1 where owner = ‘abcd’; B、Select * from t1 where owner <>'abcd'; C、Select * from t1 where owner not in(‘abcd’); D、Select * from t1 where not (owner = ‘abcd’)不在提醒