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Is there an efficient way to update a selection of rows' field to 0, but set One of these rows to 1 based on an ID.
Basically, I have multiple objects in a database, and I want to toggle between which one is "inuse", so the query will set one of the rows (by id) to inuse=1 and the others to inuse=0.
Thanks :)
759
MySQL UPDATE command can be used to update multiple columns by specifying a comma separated list of column_name = new_value. Where column_name is the name of the column to be updated and new_value is the new value with which the column will be updated.
First, specify the table name that you want to change data in the UPDATE clause. Second, assign a new value for the column that you want to update. In case you want to update data in multiple columns, each column = value pair is separated by a comma (,). Third, specify which rows you want to update in the WHERE clause.
There are a couple of ways to do it. INSERT INTO students (id, score1, score2) VALUES (1, 5, 8), (2, 10, 8), (3, 8, 3), (4, 10, 7) ON DUPLICATE KEY UPDATE score1 = VALUES(score1), score2 = VALUES(score2);
To replace, use the REPLACE() MySQL function. Since you need to update the table for this, use the UPDATE() function with the SET clause.
UPDATE `table`
SET `inuse` = (`id` = 23)
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