Question

create table table1
(
  column1 varchar2(8)
  check constraint column1_ch check ........
);

How do I do a check for a data that the first 4 char is a specific set of alphabets while the last 4 is numbers? and as well as a range of values.

examples, data can be ABCD2121, ABCD1111.

range – ABCD0001 to ABCD9999

So ‘ABCD’ is fixed while the numbers are changing.

I’ve foudn online about using ‘[]” to define the numbers but i’m not able to integrate it into my constraint.

Thanks

Answer 1

The easiest way is to do this using a regular expression:

alter table table1
  add constraint chck_code check (regexp_like(column1, '(ABCD)[0-9]{4}') );