Finding column count with dynamic columns and dynamic tables

Question

I've done some PL/SQL for awhile now but was trying to devise a solution for the following problem:
I wish to find the number of times a specific value for a column exists in all the tables that contain the field and I have access to see with the current user. The column name and value will be passed in via parameters.
I was hoping to use something like
select table_name from all_tab_columns where column_name = <variable table name>;
then use the results from this to create a select statment based off the tables from the select above. I know the difference between dba_tab_columns and all_tab_columns - I want to make sure that I only retrieve the values i have access to.
Can anyone point me to some guide / website / reference material I can read to catch up on the idea of creating this statment?
Thank you.

Answer 1

Hi,
it's a test version.
You can naturally tune it, but it seemed to work:
declare
pi_column VARCHAR2(30) := 'DEPTNO';
pi_value VARCHAR2(4000) := '20';
v_count NUMBER := 0;
v_count_tab NUMBER;
BEGIN
FOR I IN (select owner, table_name from dba_tab_columns
          where column_name = pi_column
LOOP
    EXECUTE IMMEDIATE 'SELECT count(*) FROM '||i.owner||'.'||i.table_name||
                      ' WHERE '||pi_column||' = :pi_value'  INTO v_count_tab USING pi_value; 
    v_count := v_count + v_count_tab;
END LOOP;                   
dbms_output.put_line(v_count);
END;Regards