NOT Archives

How To Use NOT NULL Constraint In SQL

Yasin Panwala Dec 3, 2019 3 787

In this article, we will learn how to use the NOT NULL constraint in SQL.

A column can hold NULL values by default. The NOT NULL constraint is used to enforce a column to NOT accept NULL values.

Yasin Panwala Nov 9, 2019 0 675

In this article, we will learn how to use AND, OR, NOT operators with a SQL select query.

AND, OR, and NOT operators can be combined with the WHERE clause.

To filter records and extract only those records that fulfill a specified condition, The WHERE clause is used.