SQL And & Or

AND & OR

AND and OR join two or more conditions in a WHERE clause.

The AND operator displays a row if ALL conditions listed are true. The OR operator displays a row if ANY of the conditions listed are true.

Original Table (used in the examples)

LastName	FirstName	Address	City
Hansen	Ola	Timoteivn 10	Sandnes
Svendson	Tove	Borgvn 23	Sandnes
Svendson	Stephen	Kaivn 18	Sandnes

Example

Use AND to display each person with the first name equal to "Tove", and the last name equal to "Svendson":

SELECT * FROM Persons WHERE FirstName='Tove' AND LastName='Svendson'

Result:

LastName	FirstName	Address	City
Svendson	Tove	Borgvn 23	Sandnes

Example

Use OR to display each person with the first name equal to "Tove", or the last name equal to "Svendson":

SELECT * FROM Persons WHERE firstname='Tove' OR lastname='Svendson'

Result:

LastName	FirstName	Address	City
Svendson	Tove	Borgvn 23	Sandnes
Svendson	Stephen	Kaivn 18	Sandnes

Example

You can also combine AND and OR (use parentheses to form complex expressions):

SELECT * FROM Persons WHERE (FirstName='Tove' OR FirstName='Stephen') AND LastName='Svendson'

Result:

LastName	FirstName	Address	City
Svendson	Tove	Borgvn 23	Sandnes
Svendson	Stephen	Kaivn 18	Sandnes