MySQL UPDATE Examples

The UPDATE statement is used to update existing records in a table.

Replace/Delete part of a string

Replace “http://” with “https://” in users.website field

UPDATE users SET website=REPLACE(website,'http://','https://')

Delete a part

UPDATE users SET website=REPLACE(website,'http://example.com','')

UPDATE query with condition

UPDATE account
SET validated = 0
WHERE email IS null

Update Column +1

If the column is a number, you can set it like this.

UPDATE table
SET column_name = column_name + 1
WHERE id = <any id>

UPDATE query based on SELECT query

We have 2 tables, account and user_info and want to update account.active to true if user_info.country is “USA”.

UPDATE account
SET account.active = 1
FROM (SELECT id, country FROM user_info)
WHERE account.id = user_info.id AND user_info.country = 'USA'

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