Count the records

Question

i have two tables like master and child having below records.Please find the records.
Master table
CODE STATUS
ABC U
ABC S
Histrory Table
CODE status
ABC S
I WANT THE RESULT
STATUS COUNT
U 1
S 2
i am using below query it is not working,It shows only for status(S) count 3 not for Status U.How shall we count this reocrd.,
SELECT x+y as total from
select count(1) x,staus from master
where code like 'AB%' group by status
select count(1) y,status from history
where code like 'AB%' GROUP BY STATUS)

Answer 1

Hello
You need to union all the two tables together:
tylerd@DEV2> CREATE TABLE dt_test_code_table
  2  (   col1    VARCHAR2(3),
  3      col2    VARCHAR2(1)
  4  )
  5  /
Table created.
Elapsed: 00:00:00.36
tylerd@DEV2> CREATE TABLE dt_test_code_table_hist
  2  (   col1    VARCHAR2(3),
  3      col2    VARCHAR2(1)
  4  )
  5  /
Table created.
Elapsed: 00:00:00.04
tylerd@DEV2>
tylerd@DEV2> INSERT INTO dt_test_code_table VALUES('ABC','U')
  2  /
1 row created.
Elapsed: 00:00:00.01
tylerd@DEV2> INSERT INTO dt_test_code_table VALUES('ABC','S')
  2  /
1 row created.
Elapsed: 00:00:00.00
tylerd@DEV2> INSERT INTO dt_test_code_table_hist VALUES('ABC','U')
  2  /
1 row created.
Elapsed: 00:00:00.00
tylerd@DEV2>
tylerd@DEV2> SELECT
  2      COUNT(*),
  3      col2
  4  FROM
  5      (   SELECT
  6              col2
  7          FROM
  8              dt_test_code_table
  9          UNION ALL
10          SELECT
11              col2
12          FROM
13              dt_test_code_table_hist
14      )
15  GROUP BY
16      col2
17  /
  COUNT(*) C
         2 U
         1 S
2 rows selected.
Elapsed: 00:00:00.03HTH
David
Message was edited by:
David Tyler
Eric beat me too it! :-)