| From: | msi77 <msi77(at)yandex(dot)ru> |
|---|---|
| To: | JORGE MALDONADO <jorgemal1960(at)gmail(dot)com> |
| Cc: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: Query execution based on a condition |
| Date: | 2012-12-29 19:36:56 |
| Message-ID: | 2795691356809816@web15e.yandex.ru |
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| Thread: | |
| Lists: | pgsql-sql |
Change the conditions of other 3 queries, so those shall give empty row sets depending on your value.
29.12.2012, 23:06, "JORGE MALDONADO" <jorgemal1960(at)gmail(dot)com>:
> I have a query similar to the one shown below but, depending on the value of a field, only the first SELECT statement shoud execute and the other 3 should be ignored. Is there a way to achieve this situation?
>
> SELECT fields FROM tblTable WHERE condition
> UNION
>
> SELECT fields FROM tblTable WHERE condition
>
> UNION
>
> SELECT fields FROM tblTable WHERE condition
> UNION
>
> SELECT fields FROM tblTable WHERE condition
>
> Respectfully,
> Jorge Maldonado
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