Problem with a query with WITH clause

Question

Hi,
i'm facing with a problem, so i describe a little:
create table schoolboys (
id integer,
name varchar2(20)
create table marks (
schoolboy_id integer,
mark integer,
mark_type char(1))
create table avg_marks (
schoolboy_id integer,
avg_mark number (5,2)
insert into A values (50, 9, 'N');
insert into A values (50, 7, 'N');
insert into A values (50, 6, 'T');
insert into A values (88, 9, 'N');
insert into A values (88, 7, 'N');
insert into A values (88, 10, 'T');
insert into A values (20, 4, 'N');
insert into A values (20, 5, 'N');
insert into A values (20, 3, 'N');
insert into A values (20, 5, 'T');and i have this query for multiple insert into another table
INSERT INTO avg_marks
           (schoolboy_id,
            avg_mark)
(SELECT   schoolboy_id,
          (Avg(Decode(mark_type,'T',NULL,
                                mark)) * 3 + Sum(Decode(mark_type,'T',mark,
                                                                  0))) / 4
FROM     marks
GROUP BY schoolboy_id);but what i want is to insert into avg_marks only those records where
((Avg(Decode(mark_type,'T',NULL,
                                mark)) * 3 + Sum(Decode(mark_type,'T',mark,
                                                                  0))) / 4) > 5so i wanna restrict the insertion in avg_marks.
if there are results with (avg(decode...)) < 5 those records i wanna be inserted in another table, with the same columns as avg_marks
how should i code this? what should i use?
i tried with
with t as(
(SELECT   schoolboy_id,
          ((Avg(Decode(mark_type,'T',NULL,mark)) * 3
          + Sum(Decode(mark_type,'T',mark,0)) / 4))>5) MARK
from MARKS
INSERT INTO avg_marks
           (schoolboy_id,
            avg_mark) values (t.schoolboy_id, t.MARK)
ORA-00923: FROM keyword not found where expectedBest regards,
Edited by: Roger22 on 18.06.2009 11:36
corrected

Answer 1

Sorry, overlooked that part of your question:
Try:
INSERT INTO avg_marks2
           (schoolboy_id,
            avg_mark)
(SELECT   schoolboy_id,
          (Avg(Decode(mark_type,'T',NULL,
                                mark)) * 3 + Sum(Decode(mark_type,'T',mark,
                                                                  0))) / 4
FROM     marks
GROUP BY schoolboy_id HAVING ((Avg(Decode(mark_type,'T',NULL,
                                mark)) * 3 + Sum(Decode(mark_type,'T',mark,
                                                                  0))) / 4) < 5);Remember to capture those where the avg_mark is equal to 5 too, so you many want:
INSERT INTO avg_marks2
           (schoolboy_id,
            avg_mark)
(SELECT   schoolboy_id,
          (Avg(Decode(mark_type,'T',NULL,
                                mark)) * 3 + Sum(Decode(mark_type,'T',mark,
                                                                  0))) / 4
FROM     marks
GROUP BY schoolboy_id HAVING ((Avg(Decode(mark_type,'T',NULL,
                                mark)) * 3 + Sum(Decode(mark_type,'T',mark,
                                                                  0))) / 4) <= 5);