Display and return value in select list.

Question

hi,
i want to display the value in select list coming from this quary .
select student_id from class_record where class_id =:p1_class_id and SECTION =:p1_section
minus
select student_id from STUDENT_TYPE_DETAILS where class_id =:p1_class_id and SECTION =:p1_section;
but i want f_name and last name with student_id .f_name and l_name store in table s_per_det.student is also in that table.
how can i define display value and return value in this quary using 3rd table s_per_det.
How can i do this.
Thanks
manoj

Answer 1

Ooh, MINUS.... Can you not use a NOT EXISTS in this case, could have a big effect on the execution plan?
Something like this perhaps?
SELECT f_name||' '||l_name,
       stundent_id
FROM class_record a,
     s_per_det b
WHERE a.student_id = b.student_id
AND   a.class_id   = :P1_CLASS_ID
AND   a.section    = :P1_SECTION
AND   NOT EXISTS(SELECT 'X'
                 FROM student_type_details c
                 WHERE a.student_id = c.student_id
                 AND   c.class_id = :P1_CLASS_ID
                 AND   c.section = :P1_SECTION)Cheers
Ben
http://www.munkyben.wordpress.com
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