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Archives of the TeradataForum
Message Posted: Fri, 11 Apr 2003 @ 18:16:21 GMT
| Subj: | | Re: How to implement the sequence concept in Teradata |
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| From: | | Ganga Palakattil |
Sequence Number is available with V2R5.
It is very useful in some cases.
For example, if you need to keep a log table (process log), it is a good idea to generate an automatic sequence number to identify
the process. Latest run of the process will have the maximum value for the Sequence Number. Form a visual perspective, it is very
easy to distinguish from a timestamp. Though you can always create one programmatically, it is much more convenient to depend on a
system generated one. That is the reason Oracle/UDB(DB2)/SQL Server are providing it. In very rare situations, if you cannot
guarantee uniqueness of a row and still you need one, this is the most convenient one from my experience with Oracle/DB2/SQl
Server
-Ganga Palakattil
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