How to correct the sql for this

Here is my requirement
How to find the master apps for this.
If there is rollup info for a app then it is parent
Rollup info is present in table B with flag R
Table A
AppNo Name
1 abc
2 xyz
3 pqr
4 mno
5 stu
6 ccc
7 ddd
Table B
srce dpnt flag
1 1 R
2 6 R
2 7 R
3 4 R
So now the parent apps are 1,2,3 since they have children (1,6,7,4)
Now i want 5 to be included in the parent list as it is an independent app
Appno name
1 abc
2 xyz
3 pqr
5 stu
my query is not including appno
appno name
5 stu
select * from TableA a
where a.appno in (
select distinct SRCE from TableB where b.SRCE=a.appno
and b.flag='R' )

one solution:
select srce from table_b
union
select appno from table_a
minus
select dpnt from table_b
)

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I have a requirement like this
I have 5 tables which i have to join to get the result
but there no join column to 2 other table.
I want to get all the applications using cobal,running on UNIX.
How to write the query for this
1.APP
APP_i DESC
1 Accounts
2 Payments
3 order transfer
4 Order processing
2.Techgy
techid techdesc
1 cobal
2 Java
3.APP_Techgy
APP_I Techid
1 1
2 1
3 1
4 2
4.Pltfrm
pltfmid pltfrmdesc
1 Windows NT
2 UNIX
5.APP_Pltfrm
APP_I pltfrmid
1 1
2 1
3 2
4 2
ouput must be
APP_i Desc techDESC pltfrmdesc
3 ordertranfer Cobal UNIX
Thanks in advance

This ('descr' in place of 'desc')?
SQL> select a.app_i, a.descr, t.techdesc, p.pltfrmdesc
from app_techgy atc,
   app a,
   techgy t,
   app_pltfrm ap,
   pltfrm p
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and atc.app_i = a.app_i
and atc.app_i = ap.app_i
and ap.pltfrmid = p.pltfmid
order by a.app_i
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         1 accounts             cobal                windows nt
         2 payments             cobal                windows nt
         3 order transfer       cobal                unix
         4 order processing     java                 unix
4 rows selected.

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Hi,
"select id from order where cmd like 'Error ID %'"
This s my script. And the order table has morethan *5lakhs* records, when i select id for the above condition, my sql script cost is - *2200*,and cpu_cost is -- *235660697* i got this above information thro' plan_table, could anyone plz give suggestion to reduce the cost. (fyi -- cmd field has index with not null constraint).
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user13294228 wrote:
"select id from order where cmd like 'Error ID %'"
This s my script. And the order table has morethan *5lakhs* records, when i select id for the above condition, my sql script cost is - *2200*,and cpu_cost is -- *235660697* i got this above information thro' plan_table, could anyone plz give suggestion to reduce the cost. (fyi -- cmd field has index with not null constraint).What does these cost numbers mean? Do you know what it means and what measurement unit is used for these costs? Will a cost of 2000 be fine? 1500? What specific number will make you sit back and think that the cost is now acceptable?
Or instead, do you not think it is more important to rather look at what the query does and why.. and then determine if there are methods to do that better and faster?
So let's look at what the query does. It uses a a LIKE predicate. This means that if an index is available, it cannot be used to find a specific indexed value... as the query is not sure what the value is. All that the query knows is what the first couple of characters are for the value.
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I am building a Infospoke on a Cube to export data to Application Server.
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How to write the SQL for the following

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1     B     N     200
1     C     N     300
1     D     N     400
2     A     N     10
2     B     Y     20
2     C     N     30
2     D     N     40
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Hello, I presume the NUMBER you refer to will be held in a table column somewhere? I'm calling it threshold_num in the test data below (and rec_id instead of ID):
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SELECT 'C', 30 FROM DUAL UNION ALL
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     JOIN test_ref_data trd
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         1 D          0
         1 B          0
         2 C          0
         1 C          0
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How to construct a SQL for this logic.

Hi,
I have a requirement like, i need to derive a column with a calculation.
Here is the psedocode,
count of occurance (deptno=10)/count (deptno=10)
Desired result:
If the deptno =10 occurs 3 times in the table then at the fist time the calcuation should be,
1/3, second time 2/3, third time 3/3 and so on.
How can i construct this in a sql query. Please help.
Any help will be appreciated with points.
Thanks.

WITH DATA AS
(SELECT DEPTNO,
ROW_NUMBER() OVER(PARTITION BY DEPTNO ORDER BY DEPTNO) RN,
COUNT(DEPTNO) OVER(PARTITION BY DEPTNO ORDER BY DEPTNO) CNTDEPTNO
FROM SCOTT.EMP)
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How to write Dynamic SQL for this SQL ?

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Hi Friends,
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i am develop the report that is :
Based on Selction Critirea kunnr(knvv-kunnr)
i want Delete the
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please how to Write the LOGIC For this Program .
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