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AVG() Function in MySQL
  • Last Updated : 21 Jan, 2021

AVG() function :

This function in MySQL is used to return the average value of the specified expression.

Features :

  • This function is used to find the average value of the specified expression.
  • This function comes under Numeric Functions.
  • This function accepts only one parameter namely expression.
  • This function ignores NULL values.

Syntax :

AVG(expression)

Parameter :



This method accepts only one parameter as follows.

  • expression –The specified numeric value may be either a stated field or a stated formula.

Returns :

It returns the average value of the specified expression.

Example-1 :

Using AVG() function and getting the output.

Creating table –

CREATE TABLE item13
(  
user_id int,    
product01 VARCHAR(4),
product02 VARCHAR(10),
price int  
);

Inserting data –

INSERT item13(product01, price)  
VALUES ('rice', 500);

INSERT item13(product02, price)  
VALUES ('grains', 700);

Reading Data –



SELECT AVG(price) FROM item13;

Output :

600

Here, the average of the first product’s price and the second product’s price is returned.

Example-2 :

Using AVG() function and getting the average of float values.

Creating table –

CREATE TABLE floats
(  
user_id int,
float_val float
);

Inserting Data –

INSERT floats(float_val)  
VALUES (3.5);

INSERT floats(float_val)  
VALUES (2.5);

Reading Data –

SELECT AVG(float_val) FROM floats;

Output :

3

Example-3 :

Using AVG() function and getting the output where MRP is greater than the average MRP of the products.



Creating table –

CREATE TABLE package01
(  
user_id int NOT NULL AUTO_INCREMENT,  
item VARCHAR(10),
mrp int, 
PRIMARY KEY(user_id)  
);

Inserting Data –

INSERT package01(item, mrp)  
VALUES ('book1', 250);

INSERT package01(item, mrp)  
VALUES ('book2', 350);

INSERT package01(item, mrp)  
VALUES ('book3', 400);

Reading Data –

SELECT * FROM package01
WHERE mrp > (SELECT AVG(mrp) FROM package01);

Output :

user_iditemmrp
2book2350
3book3400

Example-4 :

Using AVG() function and getting the average of the (MRP-sales price).

Creating table –

CREATE TABLE package011
(  
user_id int NOT NULL AUTO_INCREMENT,  
item VARCHAR(10) NOT NULL,
mrp int NOT NULL,
sp int NOT NULL,
PRIMARY KEY(user_id)  
);

Inserting Data –

INSERT package011(item, mrp, sp)  
VALUES ('book1', 250, 240);

INSERT package011(item, mrp, sp)  
VALUES ('book2', 350, 320);

INSERT package011(item, mrp, sp)  
VALUES ('book3', 400, 350);

Reading Data –

SELECT AVG(mrp-sp) FROM package011;

Output :

30

Application :

This function is used to find the average of the expression specified.

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