How to look for a certain value in a database using sql

Question

Hello everyone. How do you do this in SQL? Or, is there a way to look for a certain value in a database? What I'm trying to do is this:
I want to look for the exact value "abcdefg" in the database so that oracle will return me details on the following that contains the said value:
1. the name of the table(s)
2. the column/field name(s)
Note: "abcdefg" could exist in different tables with different column names with different data types.
Any help is much appreciated. Thanks.
UPDATE: What about if I just want to check those fields/columns with string data types?
Message was edited by:
dongzky
Message was edited by:
dongzky

Answer 1

Just a teeny tweek
DECLARE
   l_dummy   VARCHAR2 (4000);
BEGIN
   FOR rec IN (SELECT table_name
                 FROM all_tables)
   LOOP
      FOR rec2 IN (SELECT column_name
                     FROM user_tab_cols
                    WHERE table_name = rec.table_name)
      LOOP
         BEGIN
            EXECUTE IMMEDIATE    'select 1 from '
                              || rec.table_name
                        || ' where to_char('
|| rec2.column_name
|| ') = ''CAS'' and rownum = 1'
                         INTO l_dummy;
            DBMS_OUTPUT.PUT_LINE (rec.table_name || ' ' || rec2.column_name);
         EXCEPTION
            WHEN NO_DATA_FOUND
            THEN
               NULL;
         END;
      END LOOP;
   END LOOP;
END;