How to add a positive integer constraint to a integer column in MySQL?

Question

How can we add a constraint which enforces a column to have only positive values.

Tried the following mysql statement but it doesn\'t work

create tab         


        

Answer 1

As of MySQL 8.0.16 (MariaDB 10.2.1), CHECK constraints are enforced. (In earlier versions constraint expressions were accepted in the syntax but ignored).

Therefore you can use:

CREATE TABLE test (
    test_column INT CHECK (test_column > 0)
);

or

CREATE TABLE test (
    test_column INT,
    CONSTRAINT test_column_positive CHECK (test_column > 0)
);