Hi everyone, I ran a query which is: select A.a as a,B.b as b from A left join B on A.c=B.c and A.d=B.d order by A.c,A.d; Both table A and Table B have about 3000 records.And there are about 3000 records in the result.But it takes 3 minutes and 50 seconds to run the query. Does anybody know how to make it faster?
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