Re: How to use nested select statements

At 08:31 PM 11/29/00 +0530, Sanjay Arora wrote:

>Well I want to use nested select statements ,is it possible.

In PG 7.0 you can use subselects in the "where" clause.

>Is there any counterpart for 'Sysdate from dual' as in Oracle

You don't need "dual", just "select now()" will work.

If you're porting Oracle code, you can make life a lot easier by
defining some stuff:

create function sysdate() returns datetime as '
begin
return ''now'';
end;' language 'plpgsql';

create view dual as select sysdate();

Then "select sysdate from dual", "select (any expression) from dual", etc all do what
you'd expect.

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