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Sequences III
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Sequences III
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sknox
sknox
Posted Monday, April 30, 2012 8:29 PM
Ten Centuries
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Comments posted to this topic are about the item
Sequences III
Post #1292905
bitbucket-25253
bitbucket-25253
Posted Monday, April 30, 2012 8:30 PM
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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
Please help us, help you -before posting a question please
read
Before posting a performance problem please
read
Post #1292908
Revenant
Revenant
Posted Monday, April 30, 2012 10:51 PM
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Thanks for a really easy one!
(I wish I came up with it...)
Post #1292933
marlon.seton
marlon.seton
Posted Tuesday, May 01, 2012 1:50 AM
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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.
Post #1292967
L' Eomot Inversé
L' Eomot Inversé
Posted Tuesday, May 01, 2012 3:09 AM
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Nice question. Easy if one recognises the decimal representation of 2**31.
Tom
Que conclure à la fin de tous mes longs propos? C'est que les préjugés sont la raison des sots. (Voltaire, 1756)
Post #1292994
Thomas Abraham
Thomas Abraham
Posted Tuesday, May 01, 2012 5:37 AM
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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!
Please don't go. The drones need you. They look up to you.
Post #1293043
Michael Lysons
Michael Lysons
Posted Tuesday, May 01, 2012 5:38 AM
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I like these sequence questions, despite the fact I keep getting them wrong
Post #1293044
Toreador
Toreador
Posted Tuesday, May 01, 2012 5:49 AM
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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.
Post #1293051
marlon.seton
marlon.seton
Posted Tuesday, May 01, 2012 5:56 AM
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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.
Post #1293056
EL Jerry
EL Jerry
Posted Tuesday, May 01, 2012 7:59 AM
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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.
"A watt of Ottawa" - Gerardo Galvan
Post #1293168
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