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Sunday, September 15, 2013

SQL SERVER – Explanation and Understanding NOT NULL Constraint | Journey to SQL Authority with Pinal Dave

NOT NULL is integrity CONSTRAINT. It does not allow creating of the row where column contains NULL value. Most discussed question about NULL is what is NULL? I will not go in depth analysis it. Simply put NULL is unknown or missing data. When NULL is present in database columns, it can affect the integrity… Continue Reading...

Source: SQL SERVER – Explanation and Understanding NOT NULL Constraint | Journey to SQL Authority with Pinal Dave