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jscot
Posting Yak Master
106 Posts |
 Posted - 2010-10-19 : 23:28:02
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| I have a field called "OrderID" i want this field auto generate"Unique" let say "COV-YYMMDDSS" so every time ORderid create it should be unique. Please send me t-sql code. Thanks in advance |
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tkizer
Almighty SQL Goddess
38200 Posts |
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jscot
Posting Yak Master
106 Posts |
Posted - 2010-10-19 : 23:51:57
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| Table is already created and i can't change table structure. and requirement is use "ORderID" as a unique and auto generate. |
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jscot
Posting Yak Master
106 Posts |
Posted - 2010-10-19 : 23:52:35
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| Performance no concern, no issue! |
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tkizer
Almighty SQL Goddess
38200 Posts |
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GilaMonster
Master Smack Fu Yak Hacker
4507 Posts |
Posted - 2010-10-20 : 01:53:32
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| I hope you don't ever have more than one row inserted in a second, or that will no longer be unique.--Gail ShawSQL Server MVP |
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jscot
Posting Yak Master
106 Posts |
Posted - 2010-10-20 : 08:56:25
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| COV Stand company name, It could be anything ABC-101020(SS) IF SECOND giving any problem then ABC-1010201,ABC-1010202,ABC-1010203 AND SO ON. Please any 1 paste a code for me, Thanks. |
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Michael Valentine Jones
Yak DBA Kernel (pronounced Colonel)
7020 Posts |
Posted - 2010-10-20 : 09:59:48
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| There are several things wrong with your plan.First, the two digit year limits the system to a lifetime of 10 years.Second, the two digit second limits your system to a maximum of 99 orders per day.CODO ERGO SUM |
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Autogenerate "ORDERID"