Select rows from a table where row in another table with same id has a particular value in another column

Question

In MySQL:

If we have two tables:

comments
key    |    value
=================
1      |    foo
2      |    bar
3      |    foobar
4      |    barfoo
         


        

Answer 1

I would use "INNER JOIN" in the following way:

SELECT comments.key, comments.value FROM comments 
INNER JOIN meta ON comments.key=meta.comment_key WHERE meta.value = 1;

Cheers! ;-)