OH MY GOD! Update Top 1 Order By Sql Server

This one uses the fact that in SQL Server its possible to update cte like updatable view. Its implementation-dependent undocumented behavior.


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UPDATE will use the clustered index orderbut you should not rely upon this.

Update top 1 order by sql server. UPDATE Messages SET status P WHERE MessageId IN SELECT TOP MaxRecords MessageId FROM Messages where Status N and InsertDate GETDATE ORDER. If you want to update the top record use a subselect or a join. UPDATE MyTable SET MyField xyz WHERE MyID SELECT MAXID from MyTable or UPDATE MyTable SET MyField xyz WHERE MyID SELECT TOP 1 ID from MyTable.


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