Tag: row_number()

Get Row Number in MySQL

~ Rahul Bhatia ~ Leave a comment

SQL Server

To return a row number with record we have ROW_NUMBER() in SQL which  returns the sequential number of a row within a partition of a result set, starting at 1 for the first row in each partition.

Syntax:

ROW_NUMBER ( )
OVER ( [ PARTITION BY value_expression , … [ n ] ] order_by_clause )

MY SQL

Here I am explaining how to return row number in my sql

For Example we have following table

CREATE TABLE tblSales(
  id     INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
  fruit  VARCHAR(32),
  amount DECIMAL
);

INSERT INTO tblSales
VALUES 
(NULL, 'apple', 12.75), 
(NULL, 'orange', 1.89), 
(NULL, 'pear', 19.23),
(NULL, 'banana', 4.25), 
(NULL, 'cherry', 123.75), 
(NULL, 'plum', 23.15);
SELECT fruit, amount FROM tblSales ORDER BY amount DESC;

If we run this query it will result like
+--------+--------+
| fruit  | amount |
+--------+--------+
| cherry |    124 |
| plum   |     23 |
| pear   |     19 |
| apple  |     13 |
| banana |      4 |
| orange |      2 |
+--------+--------+



Now here is the query with ranking

SET @rank=0;
SELECT @rank:=@rank+1 AS rank, fruit, amount FROM tblSales
 ORDER BY amount DESC;

+------+--------+--------+
| rank | fruit  | amount |
+------+--------+--------+
|    1 | cherry |    124 |
|    2 | plum   |     23 |
|    3 | pear   |     19 |
|    4 | apple  |     13 |
|    5 | banana |      4 |
|    6 | orange |      2 |
+------+--------+--------+
Hope it helps!