Need query for this logic..

Question

Hi,
Need a SQL query to achieve this..
Ex:
Select object_name from user_objects where object_name in('EMP','DEPT')
You will get 2 table names.
DEPT
EMP
Now I want to count how many records are there in each table
Output should be like
DEPT 4
EMP 13
Please let me know how can we write it ?
Thanks in Advance
Devender

Answer 1

You need to create a function to cout rows.
Here is an example
CREATE OR REPLACE
FUNCTION get_rows (
     t_owner IN varchar2 default user,
    t_name IN varchar2
RETURN  integer
IS
     outVal integer;
BEGIN
     select null
     into outVal
     from dba_tables
     where ( owner=t_owner )
          and ( table_name=t_name );
    execute immediate 'select count(*) from '||t_owner||'.'||t_name into outVal;
    RETURN outVal;
EXCEPTION
     WHEN no_data_found THEN
          return null;
END;
/And here is the query.
Processing ...
select owner,object_name,get_rows(owner,object_name) n_rows
from dba_objects
where object_name in('EMP','DEPT')
Query finished, retrieving results...
       OWNER                       OBJECT_NAME                                          ROWS                
SCOTT                    EMP                                                                       14
SCOTT                    DEPT                                                                       4
2 row(s) retrieved