I do got a database named "MAPPINGS" with about 23.000 rows I need to replace becouse of a mistake. Is there any query to achieve the following:.
UPDATE MAPPINGS SET MAIN = 'firt part' WHERE USERID = '1578' AND MAIN LIKE 'first part >%'
The problem is that "first part" is every time something else. I just need to remove everyhing after the ">" than the MAPPINGS are correct.
Or can this only be done by a PHP script? while select * from mappings where userid = '1578' and then the update query. I hope there will be a query to achieve this.
You can do this in MySQL using substring_index()
:
UPDATE MAPPINGS
SET MAIN = SUBSTRING_INDEX(MAIN, '>', 1)
WHERE MAIN LIKE '%>%' AND USERID = '1578';
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