Question

I am creating a test database. I have a bunch of columns and I want to ‘purge’ the sensitive information so that I can work on it.

id   email
1    [e-mail]
2    [e-mail]
#    email#@no-reply.com

basicall I want do do UPDATE table SET email = "email" + id + "@no-reply.com

I was going to do this in Python, but thought doing it in SQL would be easier.

Answer 1

For your case, it’ll be:

UPDATE table
SET email = CONCAT( "email", id, "@no-reply.com" );

I just used it on my own table late of mysql. Here is the result:

mysql> update late
    -> set msg = concat( id, " ", msg );
Query OK, 74397 rows affected (4.15 sec)
Rows matched: 74397  Changed: 74397  Warnings: 0