How to execute query output - oracle

Question

We have written a sql that return sum and average of numeric columns present in schema.
Could you please help us if there is there a way to execute the query and queryoutput together in a single query. We don't have create or insert permission.
select 'select avg(' || column_name ||'), sum('||column_name|| '), '|| table_name
||' from '|| table_name ||' ' ||'union all'
from all_tab_columns
where data_type= 'NUMBER'
and owner not in ('SYS','PUBLIC','WMSYS','SYSTEM')
and column_name not in ('BATCHNUM')
The output of above query is
select avg(amt), sum(amt2), table1 from table1
union all
select avg(amt2), sum(amt5), table2 from table2
Here is what we are trying to achieve in a single query
schema Tablename columname average sum
Test testable amount 10 1000
Test testable amounttrans 100 4000
Test2 transtable amount 100 5000
thank you

Answer 1

You may create a dynamic View( Ask your superuser / dba to create it for you if you don't have permission)
In this example, I'll use few rows from HR schema.You may modify it to add schema name as well using all_tab_columns
DECLARE
v_sql CLOB := empty_clob();
BEGIN
for rec IN (select 'select '''||table_name||''' as tablename,
'''||column_name||''' as columname,
avg(' || column_name ||') as average,sum('
|| column_name || ') as "SUM" from '
|| table_name
||' ' as qry
FROM user_tab_columns --all_tab_columns
where data_type= 'NUMBER'
--and owner not in ('SYS','PUBLIC','WMSYS','SYSTEM')
AND column_name NOT IN ('BATCHNUM'
)
AND ROWNUM < 10
) LOOP v_sql := v_sql
|| rec.qry
|| ' UNION ALL ';
END LOOP;
v_sql := regexp_replace(v_sql,' UNION ALL $');
EXECUTE IMMEDIATE 'CREATE OR REPLACE view my_view as ' || v_sql;
END;
/
Now, Query the view.
SQL> set sqlformat ansiconsole
SQL> select * from my_view;
TABLENAME COLUMNAME AVERAGE SUM
REGIONS REGION_ID 2.5 10
COUNTRIES REGION_ID 2.4 60
LOCATIONS LOCATION_ID 2100 48300
DEPARTMENTS DEPARTMENT_ID 140 3780
DEPARTMENTS MANAGER_ID 154.909090909090909090909090909090909091 1704
DEPARTMENTS LOCATION_ID 1777.777777777777777777777777777777777778 48000
JOBS MIN_SALARY 6573.052631578947368421052631578947368421 124888
JOBS MAX_SALARY 13215.1578947368421052631578947368421053 251088
EMPLOYEES EMPLOYEE_ID 153 16371
If you're running Oracle 12c and above, you may use DBMS_SQL.RETURN_RESULT
use the the same block above except for these changes..
DECLARE
..
v_cur SYS_REFCURSOR;
BEGIN
...
END LOOP;
v_sql := regexp_replace(v_sql,' UNION ALL $');
OPEN v_cur for v_sql;
DBMS_SQL.RETURN_RESULT(v_cur);
END;
/
ResultSet #1
TABLENAME COLUMNAME AVERAGE SUM
----------- ------------- ---------- ----------
REGIONS REGION_ID 2.5 10
COUNTRIES REGION_ID 2.4 60
LOCATIONS LOCATION_ID 2100 48300
DEPARTMENTS DEPARTMENT_ID 140 3780
DEPARTMENTS MANAGER_ID 154.909091 1704
DEPARTMENTS LOCATION_ID 1777.77778 48000
JOBS MIN_SALARY 6573.05263 124888
JOBS MAX_SALARY 13215.1579 251088
EMPLOYEES EMPLOYEE_ID 153 16371
9 rows selected.