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À
17/06/2011 10:22:21
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Autre
Titre:
Versions des environnements
SQL Server:
SQL Server 2005
Divers
Thread ID:
01514874
Message ID:
01514892
Vues:
56
>>SQL Server is all about set-based operations. If you can perform your process with set-based, it will be better than using cursors.
>>If there is absolutely no set-based alternative, then I suggest to read Brad Schulz series about cursors
>>
>>The Truth about Cursors - Part 1
>>
>>and other parts.
>
>I'm not sure what you mean by set based operations
>
>Thanks

If in your previous post you were talking about temporary storage of the query result (this is what VFP cursors are), then in SQL Server you can use
1. CTE (common table expression) or derived table - the result of CTE must be used in a next statement (e.g. it can hold data only 'once')
2. Temp table (table that starts with # sign and stored in TempDB)
3. Table variable (can be used if you're not producing a large set).
If it's not broken, fix it until it is.


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