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My SQL Tutorials My SQL Tutorial - UPDATE Using Data from Other Tables By: (Continued from previous topic...) How To Use Values from Other Tables in UPDATE Statements?
If you want to update values in one table with values from another table, you can use a subquery as an expression in the SET clause.
Chapter 1, "Getting Started with My SQL and SQL," presented a tutorial introduction to many of My SQL's capabilities.
This chapter builds on that material to go into more detail on several areas of SQL implemented by My SQL.
Only the partitions (or subpartitions) listed are checked for matches, and a row that is not in any of these partitions or subpartitions is not updated, whether it satisfies the clause, are flagged as unsafe for statement-based replication.
(This is because the order in which the rows are updated determines which rows are ignored.) Such statements produce a warning in the error log when using statement-based mode and are written to the binary log using the row-based format when using mode.
In my case, the accepted solution was just too slow.
In some cases, a utility program is available that provides a command-line interface to a statement.