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From: Andreas Wagner <thewand@web.de>
To: M Sarwar <sarwarmd02@outlook.com>
To: pgsql-admin@lists.postgresql.org <pgsql-admin@lists.postgresql.org>
Subject: Re: From CROSSTAB: One Column data with Two results columns
Date: Mon, 15 Apr 2024 19:41:47 +0200
Message-ID: <c1724e227b02088dddacb6db20e9e7b083267786.camel@web.de> (raw)
In-Reply-To: <DM4PR19MB5978C5982BF97D6DE105158AD3092@DM4PR19MB5978.namprd19.prod.outlook.com>
References: <PH2P110MB0922542FEBDBD433903505A9FF0AA@PH2P110MB0922.NAMP110.PROD.OUTLOOK.COM>
	<DM4PR19MB59785E2044FF7F30410FDAABD30A2@DM4PR19MB5978.namprd19.prod.outlook.com>
	<DM4PR19MB5978E1148EDA0DB8AA8DED7ED30A2@DM4PR19MB5978.namprd19.prod.outlook.com>
	<DM4PR19MB59788EAD138EA457D4FE6A9BD30A2@DM4PR19MB5978.namprd19.prod.outlook.com>
	<eabe02b475c34361babc34d986aef1f76bbfa7ba.camel@web.de>
	<DM4PR19MB5978C5982BF97D6DE105158AD3092@DM4PR19MB5978.namprd19.prod.outlook.com>

Hello Mr. Sarwar!

I'm not certain about first and last names in foreign countries, so my
apologies if it's your first name.

Am Montag, dem 15.04.2024 um 12:25 +0000 schrieb M Sarwar:
> 
> Hello Andreas,
> Using a function, I am generating  CROSSTAB SQL and the number of
> columns will vary for each execution. With that, it is extremely
> difficult to use view on this task.


I'm still not sure whether I understand your question. You look for a
way to produce statements like

SELECT test1p1.data, test1p2.data, test1p3.data,
	f(test1p1.data), f(test1p2.data), f(test1p3.data)
FROM test1p1, test1p2, test1p3;

programmatically? ("f()" is a user-defined function deriving the left
values on the sample-picture to the right values.)

In case using multiple tables is new to you, have a look at the "JOIN"-
statement.

Regards,
Andreas Wagner





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