On duplicate key update inserts or updates a row, the last_insert_id() function returns the auto_increment value. the on duplicate key update clause can contain multiple column assignments, separated by commas.. The on duplicate key update clause can contain multiple column assignments, separated by commas. in assignment value expressions in the on duplicate key update clause, you can use the values(col_name) function to refer to column values from the insert portion of the insert on duplicate key update statement.. Note#2: on duplicate key update makes update for existing pk id record. but also it makes update if duplicate is made on any unique key column. for example, if you defined that cname column is unique, then saving record with cname='steve' that already exist will result in update of that record (not new insert)..
Description: insert on duplicate key update now fails, when using multi-row insert statements, and setting the values of the unique key within the on duplicate key update statement back to themselves.. After posting this question mysql update or insert or die query i've change to using pdo but i'm having some issues using the on duplicate key update phrase. here's an example of my array data ar.... On duplicate key update skips auto_increment values" didn't make it into 5.0.36 and 5.1.16, so we need to adjust the bug-detection-based-on-version-number code..
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