November 2006
Intermediate to advanced
168 pages
3h 17m
German
Content preview from MySQL: kurz & gut
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| BEGIN ... END |
[Label:] BEGIN
[Anweisungen]
END [Label]
Die BEGIN...END-Anweisung wird verwendet, um mehrere SQL-Anweisungen zu einem Anweisungsblock zusammenzufassen. Wenn eine gespeicherte Routine aus mehreren Anweisungen besteht, müssen alle Anweisungen in eine äußere BEGIN...END-Anweisung eingeschlossen werden. Alle Anweisungen zwischen BEGIN und END müssen jeweils mit einem Semikolon abgeschlossen werden.
BEGIN...END-Anweisungen definieren gleichzeitig auch Geltungsbereiche für die innerhalb des jeweiligen Blocks mit DECLARE deklarierten Elemente. Jedes Element ist nur in dem Block (einschließlich der in ihm enthaltenen Blöcke) gültig, in dem es deklariert wurde. Beachten Sie, dass eine in einem eingebetteten Block deklarierte Variable eine ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.