In PostgreSQL limit Clause is used to limit the amount of data queried in a SELECT statement. The basic syntax of a SELECT statement with a LIMIT clause is as follows: The following is the syntax when the LIMIT clause is used with the OFFSET clause: Create the COMPANY table ( 下载 COMPANY SQL 文件 ), the data are as follows: The following example will find a limited amount of data, that is, read 4 pieces of data: The following results are obtained: However, in some cases, you may need to extract the record from a specific offset. The following is an example of extracting three records from the third bit: The following results are obtained: 5.22.1. Grammar ¶
SELECT column1, column2, columnN
FROM table_name
LIMIT [no of rows]
SELECT column1, column2, columnN
FROM table_name
LIMIT [no of rows] OFFSET [row num]
5.22.2. Example ¶
runoobdb# 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)
runoobdb=# SELECT * FROM COMPANY LIMIT 4;
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)
runoobdb=# SELECT * FROM COMPANY LIMIT 3 OFFSET 2;
id | name | age | address | salary
----+-------+-----+-----------+--------
3 | Teddy | 23 | Norway | 20000
4 | Mark | 25 | Rich-Mond | 65000
5 | David | 27 | Texas | 85000
(3 rows)