Simple SQL Select from 2 Tables (What is a Join?)

Question

I\'m new to SQL. I have a simple problem with getting the results from two different tables.

I have two tables in a database. The first table has a column with an id

Answer 1

You want a JOIN:

SELECT
    u.id,
    username,
    groupname
FROM
    TABLE_USERS AS u
LEFT JOIN TABLE_GROUPS AS g
    ON u.group = g.id