Multiple select Items in a Nested exists Query

You can use multiple select items in nested queries.

The use of multiple columns in this example is the same as selecting a single c1 or c2 column in the nested exists query:
1> create table t1(c1 int, c2 int)
2> go
1> create table t2(c1 int, c2 int)
2> go
1> select * from t1 where exists (select c1, c2 
   from t2)
2> go
You cannot mix an asterisk with other select items, such as:
1> select * from t1 
    where exists (select t2.*, c1 from t2)
2> go
Msg 102, Level 15, State 1:
Line 1:
Incorrect syntax near ','.