Is “Where IN” with multiple columns defined in Standard SQL?

Question

I\'m working on a query like this:

SELECT * FROM requests where (id,langid) IN (SELECT nid,langid FROM node)

My questions are

does this

Answer 1

Your query would work in Postgres. Best I'm aware, not in MySQL.

The portable version for DBs that would support it is:

SELECT * FROM requests where ROW(id,langid) IN (SELECT nid,langid FROM node)

(row is a reserved keyword since SQL:1999.)

A more portable version will be to use exists() as suggested in the other answer.