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(Bug #11758262, Bug #50439) See Section, “Determination of Safe and Unsafe Statements in Binary Logging”, for more information.If you access a column from the table to be updated in an expression, assignments are generally evaluated from left to right.Updating statistics ensures that queries compile with up-to-date statistics.However, updating statistics causes queries to recompile.We recommend not updating statistics too frequently because there is a performance tradeoff between improving query plans and the time it takes to recompile queries. UPDATE STATISTICS can use tempdb to sort the sample of rows for building statistics.Transact-SQL Syntax Conventions -- Syntax for SQL Server and Azure SQL Database UPDATE STATISTICS table_or_indexed_view_name [ ] [ WITH [ FULLSCAN [ [ , ] PERSIST_SAMPLE_PERCENT = ] | SAMPLE number [ [ , ] PERSIST_SAMPLE_PERCENT = ] | RESAMPLE [ ON PARTITIONS ( [, …n] ) ] | is not specified, the query optimizer updates all statistics for the table or indexed view.

If you set a column to the value it currently has, My SQL notices this and does not update it.However in some cases specifying the partition name can be more efficient than a complicated Specify a complete or partial name of a database link to a remote database where the object is located.You can use a database link to update a remote object only if you are using Oracle Database distributed functionality.The SQL UPDATE Query is used to modify the existing records in a table.You can use the WHERE clause with the UPDATE query to update the selected rows, otherwise all the rows would be affected.