LENGTH() Function in MySQL
Last Updated :
15 Feb, 2021
LENGTH() :
This function in MySQL is used to find the string length which is of type bytes.
Features :
- This function is used to find the string length which is of type bytes.
- This function comes under String Functions.
- This function accepts only one parameter namely string.
- This function returns the length in bytes only.
Syntax :
LENGTH(string)
Parameters :
This method accepts only one parameter.
- string –
A specified string whose length is to be counted.
Returns :
It returns the string length which is of type bytes.
Example-1 :
Using LENGTH() function and getting the output.
SELECT LENGTH("GEEKSFORGEEKS");
Output :
13
Example-2 :
Using LENGTH() function and finding the length of all the float values.
CREATE TABLE float061
(
user_id int NOT NULL AUTO_INCREMENT,
float_val float,
PRIMARY KEY(user_id)
);
INSERT float061(float_val)
VALUES (1.9);
INSERT float061(float_val)
VALUES (1.1);
INSERT float061(float_val)
VALUES (3.9);
INSERT float061(float_val)
VALUES (10.2);
INSERT float061(float_val)
VALUES (7.9);
SELECT LENGTH(float_val) FROM float061;
Output :
| LENGTH(float_val)|
-----------------------------
| 3 |
-----------------------------
| 3 |
-----------------------------
| 3 |
-----------------------------
| 4 |
-----------------------------
| 3 |
Example-3 :
Using LENGTH() function and getting the length of the item given.
CREATE TABLE package099
(
user_id int NOT NULL AUTO_INCREMENT,
item VARCHAR(10),
mrp int,
PRIMARY KEY(user_id)
);
INSERT package099(item, mrp)
VALUES ('books', 350);
SELECT LENGTH(item) FROM package099;
Output :
5
Example-4 :
Using LENGTH() function and getting the length 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, 245);
INSERT package72(item, mrp, sp)
VALUES ('book2', 350, 345);
INSERT package72(item, mrp, sp)
VALUES ('book3', 400, 350);
SELECT LENGTH(mrp+sp) FROM package72;
Output :
| LENGTH(mrp+sp) |
-----------------------------
| 3 |
-----------------------------
| 3 |
-----------------------------
| 3 |
Application :
This function is used to find the string length which is of type bytes.
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