Update multiple rows with different values in a single query - MySQL

Question

I\'m new to MySQL.

I\'m using this to update multiple rows with different values, in a single query:

UPDATE categories
    SET order         


        

Answer 1

Set title equal to itself when you don't want to update it to a different value.

UPDATE categories
    SET order = CASE id
        WHEN 1 THEN 3
        WHEN 2 THEN 4
        WHEN 3 THEN 5
    END,
    title = CASE id
        WHEN 1 THEN 'New Title 1'
        ELSE title
    END
WHERE id IN (1,2,3)

Answer 2

UPDATE `table_name` SET `field_name1` = CASE `id`
WHEN '1' THEN 'value_1'
WHEN '2' THEN 'value_2'
WHEN '3' THEN 'value_3'
ELSE `field_name1`
END,
`field_name2`= CASE id
WHEN '1' THEN 'value_1'
WHEN '2' THEN 'value_2'
WHEN '3' THEN 'value_3'
ELSE `field_name2`
END