How about:
DELETE from t_a where exist (select email from t_b where t_b.email =
t_a.email)
Rajesh Kumar Mallah wrote:
>
> Hi folks,
>
> We require to do below or similar quite often
>
> DELETE from t_a where email in (select email from t_b);
>
> everyone knows "IN" is pain fully slow currently in pgsql
> is the any fster alternative to above query
>
> regds
> Mallah.
>
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