Sql query in report/source

Question

Is possible use this kind of select select a,(select b from b) from b
in sql query in report/source?

Answer 1

Pretty much any valid select statement can be used.
If it works in SQL*Plus, then it should work in Application Express.
I think your example would not be valid if table b has more than one row.
A scalar subquery (like your "select b from b") must only return a single value.
SQL>  select ename, (select job from emp) from emp e;
ORA-01427: single-row subquery returns more than one rowIf your subquery can be restricted to return one value, then it should work.
SQL>  select ename, (select job from emp where empno = e.empno) job from emp e;
ENAME      JOB
KING       PRESIDENT
BLAKE      MANAGER
CLARK      MANAGER
JONES      MANAGER
SCOTT      ANALYST
FORD       ANALYST
SMITH      CLERK
ALLEN      SALESMAN
WARD       SALESMAN
MARTIN     SALESMAN
TURNER     SALESMAN
ADAMS      CLERK
JAMES      CLERK
MILLER     CLERK
14 rows selectedBut is that the kind of result you were looking for?