terça-feira, 3 de novembro de 2015

Data Tales #4: The Case of the Phantom Duplicate

http://ift.tt/1l6ocQe

Our intrepid DBA is attempting to enter a new value into a table and is getting an error due to violation of a unique constraint even though the value does not yet exist in the table. What could possibly be causing this?

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from SQL Server Pro http://ift.tt/1kCjeYg

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