PostgreSQL TOP LIMIT
Show Introduction to PostgreSQL LIMITPostgreSQL limit clause returns the number of rows from the table, which was mentioned in the limit value at the time of fetching the record from the table. It is an optional clause of the PostgreSQL select statement, used to fetch a limited number of rows from the whole table; this clause is also used with the offset clause to fetch records from the table. We can use this clause with an order by clause to find ascending and descending number; it is the best way to find the top and bottom value of rows using a limit clause in PostgreSQL. Syntax: Start Your Free Data Science Course Hadoop, Data Science, Statistics & others 1. PostgreSQL Limit clause Select column_name1, , column_nameN from table_name LIMIT N (Number of rows count) Select * (select all table columns) from table_name LIMIT N (Number of rows count) 2. Limit clause using offset clause Select column_name1, , column_nameN from table_name LIMIT N (Number of rows count) OFFSET N (Number of offset) Select * (select all table columns) from table_name LIMIT N (Number of rows count) OFFSET N (Number of offset) 3. Using order by clause Select column_name1, , column_nameN from table_name ORDER BY column_name LIMIT N (Number of rows count) Select column_name1, , column_nameN from table_name ORDER BY column_name LIMIT N (Number of rows count) OFFSET N (Number of offset) Select column_name1, , column_nameN from table_name ORDER BY column_name DESC LIMIT N (Number of rows count) Select column_name1, , column_nameN from table_name ORDER BY column_name ASC LIMIT N (Number of rows count) Parameter description of the above syntax is as follows:
How does the LIMIT clause work in PostgreSQL?
Examples of PostgreSQL LIMITGiven below are the examples of PostgreSQL LIMIT: We have used an employee table to describe an example of a limit in PostgreSQL: Example #1Employee table to describe an example of a limit in PostgreSQL. Code: select * from employee; Output: Example #2Example of limit by fetching data of all columns and specified number of rows from the table. In the below example, we are fetching records from all columns and retrieving data only from three columns using the PostgreSQL limit. Code: select * from employee limit 3; Output: Example #3Example of limit by fetching data of specified column and specified number of rows from the table. In the below example, we are fetching records from specified columns and retrieving data only from four columns using the PostgreSQL limit. Code: select emp_id, emp_name, emp_address emp_salary from employee limit 4; Output: Example #4Limit clause by using the offset clause to fetch data from all columns and specified rows.
Code: select * from employee limit 3 offset 3; Output: Example #5Limit clause by using the offset clause to fetch data from the specified column and specified rows.
Code: select emp_id, emp_name, emp_address emp_salary from employee limit 4 offset 3; Output: Example #6Limit using order by clause. 1. Fetch the data in ascending order by using order by. Code: select emp_id, emp_name, emp_address emp_salary from employee order by emp_id ASC limit 4 offset 3; Output: 2. Fetch the data in descending order by using order by. Code: select emp_id, emp_name, emp_address emp_salary from employee order by emp_id DESC limit 4 offset 3; Output: ConclusionThe PostgreSQL limit clause is essential in PostgreSQL to return a limited number of rows from the select queries. We have used a limit clause using offset in PostgreSQL; also, we have to fetch data in ascending and descending order by using order by clause. It is an optional clause of a select statement. Recommended ArticlesThis is a guide to PostgreSQL LIMIT. Here we discuss the introduction, how the LIMIT clause works in PostgreSQL? and examples. You may also have a look at the following articles to learn more
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