On Thu, 2021-11-11 at 09:44 +0000, Grega Jesih wrote:
> with this approach, why don't you eliminate char and varchar then ?
> Thanks for thinking over.
Two reasons:
- the SQL standard requires these types
- sometimes you want to enforce a length limit, and a "type modifier" like
varchar(30) is cheaper than a check constraint
Yours,
Laurenz Albe