Thanks for reply Tom, but which docs should I read for that ?
Tom Lane escreveu:
> =?ISO-8859-1?Q?Alexandre_Gon=E7alves_Jacarand=E1?= <[EMAIL PROTECTED]> writes:
>
>>It's possible to make an SELECT inside an AS clause ?
>
>
> No. You could try building the query as a string.
>
> regards, tom lane
>
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