Kajal_T - 6 months ago 23

SQL Question

I am trying to extract row which have only numbers in a specific column but the numbers should only be 6-digit or 12-digit.

I am trying:

`select * from table where column like '[0-9][0-9][0-9][0-9][0-9][0-9]'`

It works but seems a bit unclean to me.

Please see if anyone can provide better solution.

Many Thanks!

Answer

How about this?

```
where len(column) in (6, 12) and
column not like '%[^0-9]%'
```

The first condition checks that the length is 6 or 12. The second checks that all characters are digits.

I should note that this is almost as clear:

```
where column like '[0-9][0-9][0-9][0-9][0-9][0-9]' or
column like '[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
```