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# SQL NULL Values – IS NULL and IS NOT NULL | W3Schools Tutorial # [W3Schools Tutorial -- Learn More Than Just Technology, Dream Bigger!]( * ( * ( * ( * ( * (javascript:void(0);) * ( * ( * ( * ( * [C++]( * [C#]( * (javascript:void(0);) * ( * ( * ( * ( * (javascript:void(0);) * ( * ( * ( * ( * ( * ( * ( * (javascript:void(0)) * ( * ( * ( * ( * ( * ( * ( * ( * ( * ( * ( * ( * ( SQL Tutorial ( "SQL Tutorial") ( "SQL Introduction") ( "SQL Syntax") ( "SQL SELECT Statement") ( "SQL SELECT DISTINCT Statement") ( "SQL WHERE Clause") [SQL AND & OR]( "SQL AND & OR Operators") ( "SQL ORDER BY Keyword") ( "SQL INSERT INTO Statement") ( "SQL UPDATE Statement") ( "SQL DELETE Statement") ## Advanced SQL Tutorial ( "SQL SELECT TOP, LIMIT, ROWNUM") ( "SQL LIKE Operator") ( "SQL Wildcards") ( "SQL IN Operator") ( "SQL BETWEEN Operator") ( "SQL Aliases") ( "SQL Joins") ( "SQL INNER JOIN Keyword") ( "SQL LEFT JOIN Keyword") ( "SQL RIGHT JOIN Keyword") ( "SQL FULL OUTER JOIN Keyword") ( "SQL UNION Operator") ( "SQL SELECT INTO Statement") ( "SQL INSERT INTO SELECT Statement") ( "SQL CREATE DATABASE Statement") ( "SQL CREATE TABLE Statement") ( "SQL Constraints") ( "SQL NOT NULL Constraint") ( "SQL UNIQUE Constraint") ( "SQL PRIMARY KEY Constraint") ( "SQL FOREIGN KEY Constraint") ( "SQL CHECK Constraint") ( "SQL DEFAULT Constraint") (http:// www./sql/sql-create-index.html "SQL CREATE INDEX Statement") (http:// www./sql/sql-drop.html "SQL to Drop Indexes, Tables, and Databases") (http:// www./sql/sql-alter.html "SQL ALTER TABLE Statement") (http:// www./sql/sql-autoincrement.html "SQL AUTO INCREMENT Field") (http:// www./sql/sql-view.html "SQL CREATE VIEW, REPLACE VIEW, DROP VIEW Statements") (http:// www./sql/sql-dates.html "Date Functions in SQL Server and MySQL") (http:// www./sql/sql-null-values.html "SQL NULL Values – IS NULL and IS NOT NULL") (http:// www./sql/sql-isnull.html "SQL ISNULL(), NVL(), IFNULL(), and COALESCE() Functions") (http:// www./sql/sql-datatypes-general.html "SQL General Data Types") (http:// www./sql/sql-datatypes.html "MS Access, MySQL, and SQL Server Data Types") ## SQL Functions (http:// www./sql/sql-function.html "SQL Functions") [SQL AVG()](http:// www./sql/sql-func-avg.html "SQL AVG() Function") [S