SQL AND, OR – Filtering Data Based on Two or More Conditions

SQL AND & OR Operators: Main Tips

• The AND & OR operators filters records based on two or more conditions.
• AND operator is satisfied if only all the conditions separated by AND are TRUE.
• OR operator is satisfied if at least one of the conditions separated by OR are TRUE.

SQL AND Operator: Syntax

Shows a result if all the conditions with AND is TRUE.

SELECT column_demo1, column_demo2, ...
FROM table_demo
WHERE condition_demo1 AND condition_demo2 AND condition_demo3 ...;

Theory is great, but we recommend digging deeper!

Microsoft SQL server 2019

Taurius Litvinavicius

5.0 (0)

SQL OR Operator: Syntax

Shows a result if any of the conditions with OR is TRUE

SELECT column_demo1, column_demo2, ...
FROM table_demo
WHERE condition_demo1 OR condition_demo2 OR condition_demo3 ...;

Demo Database

This is demo example from the "Developers" table in the database:

SQL AND & OR: Examples

In this example, we select all developers from the country "India" AND the city "Delhi", in the "Developers" table:

SELECT * FROM Developers
WHERE Country='India' AND City='Delhi';

In this example, we select all developers from the city "London" OR "Paris", in the "Developers" table:

SELECT * FROM Developers
WHERE City='London' OR City='Paris';

In this example, we select all developers from the country "USA" AND the city must be equal to "New York" OR "Berlin", in the "Developers" table:

SELECT * FROM Developers
WHERE Country='USA' AND (City='New York' OR City='Miami');