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Mysql Simple Query

Required skills: CMS, PHP, MySQL, MS SQL, PostgreSQL

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this should be a 2 second job for a experience mysql programmer ..

my problem is, i have 2 tables one is called "user" another is called "mail_msg", which related through a "user_id" foreign key

what i did was i deleted some of the users from the user table, now i wanted to delete all the msg that are in that "mail_msg" table by these users.

i guess i have to use delete and join and "NULL" but still couldn't figure out how. here are table fields

for user : user_id, user_name .... etc

for mail_msg: id, user_id, user_from, user_to, ...etc
(this user_id and user_to are equal) this means user_id is the one who is receiving the msg to the other person who is "user_from" .

i want to delete all mail messages that "user_from" have been deleted in the user table,

any ideas ???



Posted In:

PHP

MySQL

CMS

MS SQL

PostgreSQL



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