The multi-part identifier could not be bound - SubQuery

Question

Schema:

create table TableA (A1 int)
create table TableB (B1 int, B2 int)
create table TableC (C1 int)

Problematic query:

S         


        

Answer 1

You cannot access an alias from a join inside of another joined subquery. You will need to use the following which joins the subquery on two columns/tables:

SELECT * 
FROM TableA a
INNER JOIN TableB b 
  ON b.B1=a.A1
INNER JOIN 
(
  SELECT * 
  FROM TableC c
) d 
  ON d.C2=b.B2
  AND d.C1 = b.B1

Or this can be written as:

SELECT * 
FROM TableA a
INNER JOIN TableB b 
  ON b.B1=a.A1
INNER JOIN TableC c
  ON c.C2=b.B2
  AND c.C1 = b.B1