Wanted to create a report

Question

Hi gurus,
i want to compare data from two tables
if the record in first table and second table is same , show in one color, else show in different color.
any idea, & suggestion to do this ?
Please it is urgent

Answer 1

Ok, here's an example then -
Using the standard EMP table
jes@DBTEST> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7839 KING PRESIDENT 17-NOV-81 5000 10
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7566 JONES MANAGER 7839 02-APR-81 2975 20
7788 SCOTT ANALYST 7566 09-DEC-82 3000 20
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7369 SMITH CLERK 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7876 ADAMS CLERK 7788 12-JAN-83 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7934 MILLER CLERK 7782 23-JAN-82 1300 10
14 rows selected.Create another table as a copy of the EMP table -
jes@DBTEST> create table emp_copy as select * from emp;
Table created.Change one of the rows in the copy
jes@DBTEST> update emp_copy set job = 'CODER' where ename = 'SCOTT';
1 row updated.
jes@DBTEST> commit;
Commit complete.Now run a query against the EMP table, checking for a matching row in the EMP_COPY table
jes@DBTEST> select e.empno,
e.ename,
e.job,
(select count(*) from emp_copy ecopy
where
ecopy.empno = e.empno
and ecopy.ename = e.ename
and ecopy.job = e.job) as match
from emp e;
EMPNO ENAME JOB MATCH
7839 KING PRESIDENT 1
7698 BLAKE MANAGER 1
7782 CLARK MANAGER 1
7566 JONES MANAGER 1
7788 SCOTT ANALYST 0
7902 FORD ANALYST 1
7369 SMITH CLERK 1
7499 ALLEN SALESMAN 1
7521 WARD SALESMAN 1
7654 MARTIN SALESMAN 1
7844 TURNER SALESMAN 1
7876 ADAMS CLERK 1
7900 JAMES CLERK 1
7934 MILLER CLERK 1
14 rows selected.So you can see that the SCOTT row was the only row that there wasn't a matching record in the EMP_COPY table (based on the comparison of the three columns).
Hence you could create your own (row based) report template that had a condition based on the MATCH column which outputs the row in one colour if the value is '1' (i.e a match) and a different colour if the value is '0' (i.e. no match).
You could then do the reverse query for the other region (i.e. comparing EMP_COPY against EMP).
There are other ways of doing this, but since you want to display in two seperate regions, this is an easier way of achieving this. Obviously you will need to adapt the queries if you want the comparison to be based on different (or more) columns than just the three I used.