(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.(Bug #11758262, Bug #50439) See Section 184.108.40.206, “Determination of Safe and Unsafe Statements in Binary Logging”, for more information.It may be worth to mention that in the beginning of the query it is not necessary to specify the path to the column of the left side, only at the end, otherwise the db will complain with ERROR: column reference "address_id" is ambiguous WITH subquery AS ( SELECT address_id, customer, address, partn FROM /* big hairy SQL */ ...This gives me an error in mysql, but I dont see why this shouldn't be possible as long as I am not changing tbl.Remember that every table row has a Primary Key column that is unique.
It identifies the table name you are looking in and resets the data in a particular column to a new value. Turns out Maru's friend Hannah is actually Maru's friend Notice that this time we selected the row to delete using the Primary Key column.If you access a column from the table to be updated in an expression, assignments are generally evaluated from left to right.For multiple-table updates, there is no guarantee that assignments are carried out in any particular order. COLUMN2 IS NULLAn outerjoin is performed based on the equijoin condition.Before version 2.5, columns got their new values immediately upon assignment.It was non-standard behaviour that was fixed in version 2.5.
In an assignment phrase, column names are on the left and the values or expressions containing the assignment values are on the right. A column name can be used in expressions on the right.