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Sequences III


Sequences III

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sknox
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Comments posted to this topic are about the item Sequences III
bitbucket-25253
bitbucket-25253
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Nice question - finally beginning to understand what a "Sequence", is and how it works ..........THANKS

If everything seems to be going well, you have obviously overlooked something.

Ron

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Revenant
Revenant
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Thanks for a really easy one!

(I wish I came up with it...)
marlon.seton
marlon.seton
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I think this question indicates that using default values with a new item like CREATE SEQUENCE isn't a great idea. I, for one, will be defining everything (AS, START WITH, INCREMENT BY, MINVALUE, MAXVALUE, CYCLE, CACHE) if I get round to using sequences in SQLServer. I know it might look wordy and take up a few more lines but for the sake of clarity, and potential help in solving problems, I would think it worth it.
Tom Thomson
Tom Thomson
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Nice question. Easy if one recognises the decimal representation of 2**31.

Tom

Thomas Abraham
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Argh! Blew right past the CYCLE/NO CYCLE option explanation in BOL, looking for behavior when min value exceeded. SHould have had that first cup of green tea.

Thanks for the question! I've really enjoyed these questions on CREATE SEQUENCE. I look forward to using it when my company moves to 2012 ....

.... in 2021!

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Michael Lysons
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I like these sequence questions, despite the fact I keep getting them wrong :-D
Toreador
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Does anyone have any suggestions for possible uses for sequences? Once upon a time I'd have used them for populating primary keys instead of using identities (ie the way I used to in Oracle). But now that we have the Output clause to easily read back the generated values there doesn't seem much advantage in using a sequence instead.
marlon.seton
marlon.seton
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Toreador (5/1/2012)
Does anyone have any suggestions for possible uses for sequences? Once upon a time I'd have used them for populating primary keys instead of using identities (ie the way I used to in Oracle). But now that we have the Output clause to easily read back the generated values there doesn't seem much advantage in using a sequence instead.


Our software has to run on Oracle and SQLServer. At the moment, the modules that use sequences are Oracle only but if we port those modules to SQLServer we would use sequence there, too, so as to keep the code as similar as possible.
EL Jerry
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Thanks for another SEQUENCEs question, I think I now understand how they work.

I agree with Marlon that defaults should not be used in sequences, as it is harder to debug when there is a problem.

"El" Jerry

"El" Jerry.

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