Sql updating multiple rows with different values speed dating phoenix


11-Nov-2017 19:49

sql updating multiple rows with different values-8

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Earlier I mentioned how to insert multiple rows in a single SQL statement using row constructors. These methods can be used separately depending on the way you get the data for update, or can be combined inside a stored procedure. The data for update could be either a scalar data or taken from the subquery results.Unfortunately there is no way to do something like this pseudo code bellow for UPDATEs: So what are the options? The only drawback of this approach is that each update is executed in its own separate transaction.Use the query below: To transfer all the new values you have in the temporary table to the original table.

There comes a time when you need to update multiple rows with different values.

(pk_vals, update_vals) ON DUPLICATE KEY UPDATE update_col=VALUES(update_col), …



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