Regular Expressions Oracle PLSQL

SQL> create table TestTable(
  2    ID                    VARCHAR2(4 BYTE)         NOT NULL,
  3    Description           VARCHAR2(30 BYTE)
  4  )
  5  /
Table created.
SQL>
SQL>
SQL> insert into TestTable (ID, Description) values('1','1234 5th Street');
1 row created.
SQL> insert into TestTable (ID, Description) values('2','1 Culloden Street');
1 row created.
SQL> insert into TestTable (ID, Description) values('3','1234 Road');
1 row created.
SQL> insert into TestTable (ID, Description) values('4','33 Thrid Road');
1 row created.
SQL> insert into TestTable (ID, Description) values('5','One than another');
1 row created.
SQL> insert into TestTable (ID, Description) values('6','2003 Movie');
1 row created.
SQL> insert into TestTable (ID, Description) values('7','Start With Letters');
1 row created.
SQL>
SQL> select * from TestTable;
ID   DESCRIPTION
---- ------------------------------
1    1234 5th Street
2    1 Culloden Street
3    1234 Road
4    33 Thrid Road
5    One than another
6    2003 Movie
7    Start With Letters
7 rows selected.
SQL>
SQL>
SQL>
SQL>
SQL> -- REGEXP_INSTR(description,'[aeiou][aeiou]'): Look for two consecutive vowels:
SQL>
SQL> SELECT description,
  2      REGEXP_INSTR(description,'[aeiou][aeiou]')
  3      where_pattern_starts
  4  FROM testTable;
DESCRIPTION                    WHERE_PATTERN_STARTS
------------------------------ --------------------
1234 5th Street                                  13
1 Culloden Street                                15
1234 Road                                         7
33 Thrid Road                                    11
One than another                                  0
2003 Movie                                        9
Start With Letters                                0
7 rows selected.
SQL>
SQL>
SQL>
SQL> drop table TestTable;
Table dropped.
SQL>
SQL>