PostgreSQL LIMIT Clause
The LIMIT clause in PostgreSQL is used to restrict the number of rows returned by a SELECT statement.
Syntax
The basic syntax of a SELECT statement with a LIMIT clause is as follows:
SELECT column1, column2, columnN
FROM table_name
LIMIT [no of rows]
The syntax when using the LIMIT clause with an OFFSET clause is:
SELECT column1, column2, columnN
FROM table_name
LIMIT [no of rows] OFFSET [row num]
Example
Create a COMPANY table (download COMPANY SQL file), with the following data:
tutorialprodb# select * from COMPANY;
id | name | age | address | salary
----+-------+-----+-----------+--------
1 | Paul | 32 | California| 20000
2 | Allen | 25 | Texas | 15000
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
6 | Kim | 22 | South-Hall| 45000
7 | James | 24 | Houston | 10000
(7 rows)
The following example will retrieve a limited number of rows, specifically 4 rows:
tutorialprodb=# SELECT * FROM COMPANY LIMIT 4;
This results in:
id | name | age | address | salary
----+-------+-----+-------------+--------
1 | Paul | 32 | California | 20000
2 | Allen | 25 | Texas | 15000
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
(4 rows)
However, in some cases, you may need to extract records starting from a specific offset.
Here is an example, extracting 3 records starting from the third position:
tutorialprodb=# SELECT * FROM COMPANY LIMIT 3 OFFSET 2;
This results in:
id | name | age | address | salary
----+-------+-----+-----------+--------
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
(3 rows)