you place your order of rows based on the values
HelloI have two tables for example: emp1 emp2 and
emp1
AD_NAME VD COURSE_NOS
------------------------------
AD1 100 3
AD2 2 2
AD3 50 5
emp 2
AD_NAME COURSE
-------------------------
AD1 C1
AD1 C2
AD1 C3
AD2 C1
AD2 C2
AD3 C1
AD3 C2
AD3 C3
AD3 C4
AD3 C5
i want to order the ad_name of emp2 based on highest vd order of emp1 but the order should be for alternative vd
like
AD1 100
AD3 50
AD2 2
AD1 100
AD3 50
AD2 2
.
.
.
AD3 50
Published by: vishnu prakash on Sep 8, 2010 04:40
You mean, more like this...
SQL> ed
Wrote file afiedt.buf
1 with emp1 as (select 'AD1' as ad_name, 100 as vd, 3 as course_nos from dual union all
2 select 'AD2', 2, 2 from dual union all
3 select 'AD3', 50, 5 from dual union all
4 select 'AD4', null, 2 from dual)
5 ,emp2 as (select 'AD1' as ad_name, 'C1' as course from dual union all
6 select 'AD1', 'C2' from dual union all
7 select 'AD1', 'C3' from dual union all
8 select 'AD2', 'C1' from dual union all
9 select 'AD2', 'C2' from dual union all
10 select 'AD3', 'C1' from dual union all
11 select 'AD3', 'C2' from dual union all
12 select 'AD3', 'C3' from dual union all
13 select 'AD3', 'C4' from dual union all
14 select 'AD3', 'C5' from dual union all
15 select 'AD4', 'C1' from dual union all
16 select 'AD4', 'C2' from dual)
17 --
18 -- END OF TEST DATA
19 --
20 select ad_name, vd, course_nos, course
21 from (
22 select emp1.ad_name, vd, course_nos, course
23 ,row_number() over (partition by emp1.ad_name order by decode(vd,null,1,0), course) as crn
24 from emp1 join emp2 on (emp1.ad_name = emp2.ad_name)
25 )
26* order by decode(vd,null,1,0), crn, vd desc nulls last
SQL> /
AD_ VD COURSE_NOS CO
--- ---------- ---------- --
AD1 100 3 C1
AD3 50 5 C1
AD2 2 2 C1
AD1 100 3 C2
AD3 50 5 C2
AD2 2 2 C2
AD1 100 3 C3
AD3 50 5 C3
AD3 50 5 C4
AD3 50 5 C5
AD4 2 C1
AD4 2 C2
12 rows selected.
SQL>
?
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