mysql - MySQL: Replace a specific MySQL Value with an SQL Query

Question

I have a database with a column 'Date'.

At first, the person whom setup the database, he wrongly set the column Type to varchar(9).

The date's are 01-01-2012 (10 Characters), thus on every single date is missing the last number.

Is it possible now to replace all 201 with 2012 using a MySQL Query?

Thanks

Answer 1

UPDATE tableName
SET columnName = REPLACE(columnName, '201', '2012')

OR

UPDATE tableName
SET columnName = CONCAT(columnName, '2')

• SQLFiddle Demo (two queries included)

Answer 2

まず、テーブルサイズをvarchar（10）に増やします。それで

UPDATE tableName
SET columnName = REPLACE(columnName, '201', '2012')