Question

I have a table that stores email in 3 diffrent columns
name host and domain.
I want to join those columns to create one column so i can search by a full email adress.
just like

SELECT * FROM email_eml WHERE (all the columns combined) = $email;

the email is stored without a . and a @ in neither of the columns i would like the final result to contain those.

Answer 1

SELECT * FROM email_eml WHERE CONCAT( name, '@', host, '.', domain ) = $email

See the doc (assuming you’re using MySQL) for the CONCAT function: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html#function_concat

However:

1. Don’t use *. It’s terrible for performance.
2. I sure hope your $email variable is escaped and free of SQL injection risks. If it’s not, use prepared statements.