Question

I have two tables, interviews and users.

inteviews looks like this:

users looks like this:

The id column in the user table will match the user column in the interviews table. How can I select all users that have not signed up for an interview?

(E.g. something along the lines of “select * from interviews left join users on interviews.id <> users.id”)

Answer 1

You’d want all the users that does not have an entry in the interviews table:

 SELECT users.* FROM users LEFT JOIN interviews 
   ON users.id = interviews.id WHERE interviews.id IS NULL

(from the looks of the tables, it sounds like it’s users.id that should be joined on interviews.user though)