SQL AND OR NOT Logical Operators

SQL  AND, OR, NOT Logical Operators. The following SQL commands show how to user AND operator, OR Operator, NOT Operator on SQL Where Clone for making condition.

AND Operator Syntax:

SELECT col1, co2, ...
FROM table_name
WHERE condition1 AND condition2 AND condition3;

Example:

SELECT * FROM employees
WHERE country='UK' AND city='London';

SQL OR Operator Syntax:

SELECT column, column, ...
FROM table_name
WHERE condition OR condition OR condition;

Example:

SELECT * FROM employees
WHERE city='London’' OR city='Toronto';

SQL NOT Operator Syntax:

SELECT column, column, ...
FROM table_name
WHERE NOT condition;

Example:

SELECT * FROM employees
WHERE NOT country='Germany';

Combining AND, OR and NOT:

SELECT * FROM employees
WHERE country='USA' AND (city='Columbus' OR city=’Chicago');

SELECT * FROM employees
WHERE NOT country='Germany' 
AND NOT country='USA';`