PostgreSQL – FROM Clause

In SQL, FROM clause is used in the select statement to list the tables from which the data is being queried.

Consider an employee table as shown below:

id	first_name	last_name	department	salary
101	bryan	walker	sales	50,000
102	alex	carpenter	accounts	55,000
103	sam	white	sales	60,000
104	john	barry	sales	54,000
105	bill	wood	accounts	65,000
106	robert	hopkins	support	70,000
107	david	lee	support	72,000
108	jack	sears	support	65,000
109	tom	young	sales	55,000

Below is the SQL query to return data from the employee table.

SELECT * FROM employee;

id first_name last_name department salary
--- --------- --------- ---------- -------
101 bryan      walker    sales      50000
102 alex       carpenter accounts   55000
.
.
.

FROM clause is always followed by the data source. In this scenario, FROM clause is followed by the employee table.