User_Id Number(6) check( user_Id like 'like '???' )

Question

hi,
i received solutions but that relate to PL/SQL.
now i m refining my query as follows which is related to table creation.
create table test
( user_Id Number(6) check( user_Id like 'like '???' )
like '???' => here ??? denotes what should i use to check for only numeric digits regardless of number of digits. For example in MS ACCESS like '#*' is used for this. Here # checks for only numeric digits while * ignores(don't cares) the number of digits.
need help for this,
best regards, Arif.

Answer 1

Hi there,
The syntax to create the table ....
create table test
( user_Id Number(6)
more column names and datatypes ...
The user_id column with NUMBER datatype will allow a maximum of up to 6 numeric digits. It will not allow any inserts or updates of this column with non-numeric data.
Your line of
"like '???' => here ??? denotes what should i use to check for only numeric digits regardless of number of digits" is not required.