1
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0answers
73 views

sql query takes too long to execute [closed]

I am having trouble with this query. It takes 10 hours to execute. WITH CONSUM AS ( SELECT C.ID_MEASURER,C.ID_MEASURING_POINT,C.CONSUM_TYPE FROM GCGT_RE_CONSUM_H_E C WHERE C.DAY ...
4
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2answers
2k views

Help to understand explain plan in Oracle

I am running a query in some big tables, and although it runs fine even tough is a lot of data, I'd like to understand what part of it weighs on the execution. Unfortunately I am not too good with ...
3
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1answer
639 views

Oracle explain for cascading delete is wrong

My deletes in Oracle 11 are very slow. The tables are linked by foreign keys and every foreign key constraint has a delete cascade set on it. If I hit the explain button on a statement like this ...
2
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1answer
1k views

Postgres multiple joins slow query, how to store default child record

Ive got a small database in Postgres, about 10,000 records storing company customers. I have a "slow" performing query (about half a second) which is performed very frequently, and my boss wants me to ...