Output only numeric values

Question

CREATE TABLE XYZ( A1 VARCHAR2(10));
Inserting value in table
SELECT * FROM XYZ;
A1
1
999
45
$
^
+
=
How get output only numeric values ?

Answer 1

Hmm..
satyaki>
satyaki>select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
Elapsed: 00:00:00.01
satyaki>
satyaki>
satyaki>CREATE TABLE XYZ( A1 VARCHAR2(10));
Table created.
Elapsed: 00:00:00.07
satyaki>
satyaki>insert into XYZ values('&val');
Enter value for val: 1
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('1')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: 999
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('999')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: 45
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('45')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: !
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('!')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: @
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('@')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: $
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('$')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: #
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('#')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: ^
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('^')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: &
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('&')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: *
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('*')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: (
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('(')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: )
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values(')')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: -
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('-')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: +
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('+')
1 row created.
Elapsed: 00:00:00.00
satyaki>/
Enter value for val: =
old   1: insert into XYZ values('&val')
new   1: insert into XYZ values('=')
1 row created.
Elapsed: 00:00:00.00
satyaki>
satyaki>commit;
Commit complete.
Elapsed: 00:00:00.00
satyaki>
satyaki>
satyaki>select * from XYZ;
A1
1
999
45
$
^
A1
+
=
15 rows selected.
Elapsed: 00:00:00.01
satyaki>
satyaki>
satyaki>
satyaki>select * from XYZ
  2     where regexp_like(A1,'[[:digit:]]');
A1
1
999
45
Elapsed: 00:00:00.00
satyaki>
satyaki>Regards.
Satyaki De.