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

I checked that with PostgreSQL and it works (it is officially supported), but it's your responsibility to make id ↔ nid and langid ↔ langid column types compatible (or use explicit casting).

I think it is pretty standard construct. I have SQL:2003 draft and there is in predicate defined (as well as mentioned exists predicate).

8.4

Function

Specify a quantified comparison.

Format

 ::=  
 ::= [ NOT ] IN 
 ::=

| ... (rest is not important here)
EDIT:
As checked works well under MySQL too (version 5.0.90-log). Here is documentation link.

                                                        

              
                
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