Not Null Meaning

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Not Null Meaning

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Chapter 11 SQL SERVER NULL VALUE What Is NULL VALUE In SQL SERVER

In SQL the NOT NULL constraint in a column means that the column cannot store NULL values college id INT NOT NULL college code VARCHAR 20 college name VARCHAR 50 Here the college id column of the Colleges table won t allow NULL values What Does Not Null Constraint Mean The not null constraint is a restriction placed on a column in a relational database table It enforces the condition that in that column every row of data must contain a value it cannot be left blank during insert or update operations

Oracle Tutorial Is NULL And Is NOT NULL YouTube

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