CHECK constraint in MySQL is not working

Question

First I created a table like

CREATE TABLE Customer (
  SD integer CHECK (SD > 0),
  Last_Name varchar (30),
  First_Name varchar(30)
);

Answer 1

Update to MySQL 8.0.16 to use checks:

As of MySQL 8.0.16, CREATE TABLE permits the core features of table and column CHECK constraints, for all storage engines. CREATE TABLE permits the following CHECK constraint syntax, for both table constraints and column constraints

MySQL Checks Documentation