Oracle: SQL query that returns rows with only numeric values

Question

I have a field (column in Oracle) called X that has values like \"a1b2c3\", \"abc\", \"1ab\", \"123\", \"156\"

how do I write an sql query that returns me only the X

Answer 1

The complete list of the regexp_like and other regexp functions in Oracle 11.1:

http://66.221.222.85/reference/regexp.html

In your example:

SELECT X
FROM test
WHERE REGEXP_LIKE(X, '^[[:digit:]]$');