SUM() Function in MySQL

SUM() function :

This function in MySQL is used to compute the sum of the specified group of values.

Features :

• This function is used to compute the sum of the specified group of values.
• This function comes under Numeric Functions.
• This function accepts only one parameter namely expression.
• This function ignores the null value.

Syntax :

SUM(expression)

Parameter :

This method accepts only one parameter as given below:

• expression: Specified expression which can either be a field or a given formula.

Returns :

It returns the sum of the specified group of values.

Example-1 :

Using SUM() function and getting the output.

CREATE TABLE product09
(  
user_id int NOT NULL AUTO_INCREMENT,  
product_1 VARCHAR(10),
product_2 VARCHAR(10),
price int,
PRIMARY KEY(user_id)   
);
INSERT product09(product_1, price)  
VALUES ('rice', 350);

INSERT product09(product_2, price)  
VALUES ('grains', 230);

SELECT SUM(price) FROM product09;

Output :

580

Example-2 :

Using SUM() function and finding the sum of all the stated float values.

CREATE TABLE float062
(  
user_id int NOT NULL AUTO_INCREMENT,
float_val float,
PRIMARY KEY(user_id)
);
INSERT float062(float_val)  
VALUES (1.9);

INSERT float062(float_val)  
VALUES (1.1);

INSERT float062(float_val)  
VALUES (3.9);

INSERT float062(float_val)  
VALUES (10.2);

INSERT float062(float_val)  
VALUES (7.9);

SELECT SUM(float_val) FROM float062;

Output :

25

Example-3 :

Using SUM() function and getting the output where MRP is less than the sum of all the MRP’s.

CREATE TABLE package77
(  
user_id int NOT NULL AUTO_INCREMENT, 
item VARCHAR(10),
mrp int,
PRIMARY KEY(user_id) 
);
INSERT package77(item, mrp)  
VALUES ('book1', 3);

INSERT package77(item, mrp)  
VALUES ('book2', 350);

INSERT package77(item, mrp)  
VALUES ('book3', 400);

SELECT * FROM package77
WHERE mrp < (SELECT SUM(mrp) FROM package77);

Output :

 user_id | item    | mrp
--------------------------------
  1      | book1   | 3
--------------------------------
  2      | book2   | 350
--------------------------------
  3      | book3   | 400

Example-4 :

Using SUM() function and getting the sum of all the (MRP-sales price) values.

CREATE TABLE package72
(  
user_id int NOT NULL AUTO_INCREMENT,  
item VARCHAR(10),
mrp int,
sp int,
PRIMARY KEY(user_id)
);
INSERT package72(item, mrp, sp)  
VALUES ('book1', 250, 240);

INSERT package72(item, mrp, sp)  
VALUES ('book2', 350, 320);

INSERT package72(item, mrp, sp)  
VALUES ('book3', 400, 350);

SELECT SUM(mrp-sp) FROM package72;

Output :

90

Application:

This function is used to compute the sum of the specified group of values.