Re: Case in Order-by clause -- RPG400-L

Subject: Re: Case in Order-by clause
From: Daniel Gross <daniel@xxxxxxxx>
Date: Tue, 3 Sep 2024 16:28:31 +0200
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Hi Martijn,

Am 03.09.2024 um 16:06 schrieb Martijn van Breden <m.vanbreden@xxxxxxxxxxxxxxxxxxxxxxxxxx>:

Thank you for thinking with me. This indeed works!

Your very welcome.

In previous preparation I already read about the difference between the case statement and the case expression. I guess the applicability in order-by clauses is one example where these differences surface.

Well - also in the SELECT, WHERE or GROUP BY clauses the case expression in completely evaluated and effectively "vanishes" from the statement.

One has to wrap its mind around the CASE - as it is something very useful.

Next step - please teach the window functions like COUNT(..) OVER(..) and SUM(CASE ...) - they give so much power.

Glad to help
Daniel

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