After I write searching code in PL/SQL blocks. I also want to add this post.
If you want to find a specific data in Tables, you may check this page:
SQL> set serveroutput on
2 dbms_output.put_line(find_in_schema(val => ‘147 Spadina Ave’));
rowid: AAAC88AAEAAAAAnAAI in LOCATIONS
PL/SQL procedure successfully completed