you mail like to find it by your self. simply use : explain <query>
re,
wh
Yong Lee schrieb:
All,
Just curious as to which query would be better in terms of performance:
select * from (select * from a union select * from b) as c;
versus
select * from a union select * from b;
or would these 2 queries be the same ?
Thanks,
Yong.
Yong Lee
Developer
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