Question

I have a table like this

USER   |   DATA
----------------
User1  |   123
User1  |   456
User2  |   456
User3  |   123
User4  |   789

and i have a UNIQUE constraint for User-Data. Now i want to replace all “456” with “123”, so in the end i’d have

USER   |   DATA
----------------
User1  |   123
User2  |   123
User3  |   123
User4  |   789

I really thought that it would be easy, u_U any idea how to proceed? any help would be appreciated =)

Thxs

Answer 1

UPDATE IGNORE yourtable SET `data`=123 WHERE `data`=456

Not so hard was it.

But how do you want to deal with this scenario:

USER   |  DATA
--------------
userx  |  123
userx  |  456

?