替换MySQL varchar中的字符

Question

I'm trying to convert a column named A with "YYYY/MM/DD" varchar (already inserted data) to a "YYYY-MM-DD" date. As an example I need the 1987/12/23 (varchar column) data to end up 1987-12-23 (date column), probably using UPDATE and REPLACE.

Answer 1

Try something like this:

UPDATE table
    SET A = replace(A, '/', '-')
    WHERE A LIKE '____/__/__';

Answer 2

正如tadman所指出的，您可以使用REPLACE功能。

UPDATE `table` SET `A`=REPLACE(`A`,'/','-')