When a query that is using NOLOCK or READ UNCOMMITTED tries to read data that is being moved or changed by another user, a 605 error occurs. The severity level of 605 errors occurring during a dirty read operation is 12 versus a severity level of 21 when reading committed data. If a 605 error that has a severity level of 12 occurs, it is most likely a transient 605 error and does not indicate a database consistency problem. To verify that it is a transient 605 error, rerun the query later.
If the error persists, remove the NOLOCK hint or set the transaction isolation level to READ COMMITTED and verify that a 605 severity level 21 does not occur. A 605 level 21 error indicates possible database corruption. If a 605 level 21 error occurs, see to SQL Server Books Online for more information and contact your primary support provider for more help.
ID do Artigo: 235880 - Última Revisão: 10/07/2008 - Revisão: 1