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GitHubLíon na míonna: 10

25. NOT NULL Constraint in MySQL.sql - GitHub

The NOT NULL constraint enforces a column to NOT accept NULL values. This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding ...
GitHubLíon na míonna: 11

MySQL-Tutorial/MySQL NOT NULL Constraint.sql at main - GitHub

-- By default, a column can hold NULL values. -- The NOT NULL constraint enforces a column to NOT accept NULL values. -- This enforces a field to always contain a value, which means that you cannot ...