Need to get the count based on the column availability

Question

You get a set of table names from a query, say
select table_name from all_tab_columns where column_name like 'DC_I’;
TABLE_NAME
A
B
C
Now, for the above set of tables (A,B and C), you need to get the count(*) for a single dc_i value (say XXX DC)
In simple words, its like framing the following 4 separate queries into one single one:
select table_name from all_tab_columns where column_name like 'DC_I’; (Based on this o/p, following 3 queries..)
select count(*) from A where dc_i=XXX;
select count(*) from B where dc_i=XXX;
select count(*) from C where dc_i=XXX;
Thanks

Answer 1

Are you looking for this?
satyaki>
satyaki>select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
Elapsed: 00:00:01.04
satyaki>
satyaki>
satyaki>
satyaki>SELECT table_name,
  2         DBMS_XMLGEN.getxmltype ('SELECT Count(*) c FROM ' || table_name||' where '||column_name|
|' = 10').EXTRACT ('//text()').getnumberval() tot_rows
  3  FROM all_tab_cols
  4  WHERE table_name in ('EMP', 'DEPT')
  5  and   column_name = 'DEPTNO';
TABLE_NAME                       TOT_ROWS
EMP                                     4
DEPT                                    1
Elapsed: 00:00:01.00
satyaki>
satyaki>
satyaki>
satyaki>select count(*) from emp where deptno = 10;
  COUNT(*)
         4
Elapsed: 00:00:00.00
satyaki>
satyaki>
satyaki>select count(*) from dept where deptno = 10;
  COUNT(*)
         1
Elapsed: 00:00:00.00
satyaki>Regards.
Satyaki De.