On Thu, 23 Aug 2001, Jaydip wrote:
> a) How do I retrieve the Year,Month,Day,Hr,Minute or Second value from a
>Date/DateTime variable.
>
> For Example : i> In Oracle to_char(dt,'yyyy') - for extracting the year value
>from a date variable dt
> ii> In SqlServer datepart(hh,dt) - for extracting the Hour value
>from a date variable dt
I'm not sure what versions all of these came in at, but:
There is a to_char which should be somewhat compatible with oracle's,
as well as a datepart (whose part names are like 'year', 'month', ...)
and extract(<part> from dt)
> b) Can I create an identity column in Postgresql the value of which column will
>start from 1 say and keep
> on incrementing by 1 OR how can I serve my purpose in any other way.
Look at sequences and the serial pseudo-type.
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