Question

I have the following oracle query which runs fine

SELECT c.customercode, s.sales_id 
FROM customers c 
LEFT JOIN sales s ON c.customercode = s.sales_id
WHERE c.address IS NOT NULL

and it returns results looking something like this:

customercode        sales_id
12345678            456
34534534            678
23423423            X123

What I would like to do is exclude rows where the sales_id contains anything other than numeric characters. So the above results would not include the 3rd row.

Answer 1

You can use regular expressions. In this case, regexp_like( sales_id, '^[[:digit:]]*$' )

SQL> with x as (select 12345678 code, '456' sales_id from dual union all
  2             select 34534534, '678' from dual union all
  3             select 23423423, 'X123' from dual)
  4  select *
  5    from x
  6   where regexp_like( sales_id, '^[[:digit:]]*$' );

      CODE SALE
---------- ----
  12345678 456
  34534534 678