How to use CHECK constraint to restrict non-numeric varchar2 (only alphabets)?
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14-04-2021 - |
Вопрос
I have a column NAME
It must contain only characters and not numbers
How do I use CHECK condition:
CHECK(NAME NOT LIKE '%[0-9]%')
or any other method...
edit: Oracle database is used.
Решение
You didn't state your DBMS so I'm assuming PostgreSQL
CHECK(name ~ '^[^0-9]*$')
Другие советы
Double negative Should be standard (not MySQL though) because it uses LIKE:
CHECK(NAME NOT LIKE '%[^a-zA-Z]%')
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