CHARACTER_LENGTH Function in SQL

The CHARACTER_LENGTH string function of Structured Query Language returns the number of characters of the given string. This function is a synonym of CHAR_LENGTH function in SQL.

Syntax of CHARACTER_LENGTH String Function

Syntax1: This syntax uses the CHARACTER_LENGTH function with the column name of the SQL table:

In the first syntax, we have to specify the name of that column on which we want to execute the CHARACTER_LENGTH string function for finding the number of characters of each value.

Syntax2: This syntax uses the CHARACTER_LENGTH function with the string:

Examples of CHARACTER_LENGTH String function

Example 1: The following SELECT query shows the total number of characters of the given JAVATPOINT word:

Output:

CHARACTER_LENGTH_word

Example 2: The following SELECT query shows the total number of characters of the given string:

SELECT CHARACTER_LENGTH(  'JAVATPOINT is a good website') AS CHARACTER_LENGTH_string;

Output:

CHARACTER_LENGTH_string

Example 3: The following SELECT query shows the CHARACTER_LENGTH 16 characters from the given sentence:

SELECT CHARACTER_LENGTH(  'NEW DELHI IS THE CAPITAL OF INDIA') AS CHARACTER_LENGTH_Sentence;

Output:

CHARACTER_LENGTH_Sentence

Example 4: The following SELECT query shows the length of the given string:

Output:

CHARACTER_LENGTH_space

Example 5: The following SELECT query shows the length of NULL word:

Output:

Length

NULL

Example 6: This example uses the CHARACTER_LENGTH function with the table in Structured Query Language.

In this example, we are going to create a new SQL table on which we want to execute the CHARACTER_LENGTH function.

The syntax for creating the new table in the SQL database is as follows:

CREATE TABLE table_name
(
First_Column_of_table Data Type (character_size of First Column),  
Second_Column_of_table Data Type (character_size of the Second column ),  
Third_Column_of_table Data Type (character_size of the Third column),  
...  

Last_Column_of_table Data Type (character_size of the Last column)
);  

The following CREATE statement creates the Worker_Grade table:

CREATE TABLE Worker_Grade
(
Worder_ID INT PRIMARY KEY,  
First_Name VARCHAR (100),  
Last_Name VARCHAR (100), 
First_City Varchar(120),
Second_City Varchar(120),
New_City Varchar(120),
Attendance_Remarks INT, 
Work_Remarks INT, 
Grade Varchar (80)
);

The below INSERT queries insert the records of Workers with Grades and Remarks in the Worker_Grade table:

INSERT INTO Worker_Grade (Worder_ID, First_Name, Last_Name, First_City, Second_City, New_City, Attendance_Remarks, Work_Remarks, Grade) VALUES (10, Aman, Sharma, Lucknow Chandigarh, Ghaziabad, 88, 95, A2);

INSERT INTO Worker_Grade 
(Worder_ID, First_Name, Last_Name, First_City, Second_City, New_City, Attendance_Remarks, Work_Remarks, Grade) 
VALUES ( 02, Vishal, Sharma, Chandigarh, Ghaziabad, Delhi, 95, 82, A1 );

INSERT INTO Worker_Grade 
(Worder_ID, First_Name, Last_Name, First_City, Second_City, New_City, Attendance_Remarks, Work_Remarks, Grade) 
VALUES (07, Raj, Gupta, Delhi, Ghaziabad, Lucknow, 91, 95, A1);

INSERT INTO Worker_Grade 
(Worder_ID, First_Name, Last_Name, First_City, Second_City, New_City, Attendance_Remarks, Work_Remarks, Grade)  
VALUES (04, Yash, Singhania, Ghaziabad, Delhi, Lucknow, 85, 82, A2);

INSERT INTO Worker_Grade 
(Worder_ID, First_Name, Last_Name, First_City, Second_City, New_City, Attendance_Remarks, Work_Remarks, Grade) 
VALUES (11, Vinay, Roy, Delhi, Kanpur, Ghaziabad, 95, 97, A1);

INSERT INTO Worker_Grade 
(Worder_ID, First_Name, Last_Name, First_City, Second_City, New_City, Attendance_Remarks, Work_Remarks, Grade) 
VALUES (16, Manoj, Gupta, Ghaziabad, Meerut, Chandigarh, 95, 90, B1);


INSERT INTO Worker_Grade 
(Worder_ID, First_Name, Last_Name, First_City, Second_City, New_City, Attendance_Remarks, Work_Remarks, Grade) 
VALUES (19, Ram, Gupta, Lucknow, Ghaziabad, Chandigarh, 89, 95, A2);

The following SELECT statement displays the inserted records of the above Worker_Grade table:

Worder_ID	First_Name	Last_Name	First_City	Second_City	New_City	Attendance_Remarks	Work_Remarks	Grade
10	Aman	Sharma	Lucknow	Chandigarh	Ghaziabad	88	95	A2
02	Vishal	Sharma	Chandigarh	Ghaziabad	Ghaziabad	95	82	A1
07	Raj	Gupta	Delhi	Ghaziabad	Lucknow	91	95	A1
04	Yash	Singhania	Ghaziabad	Delhi	Lucknow	85	82	A2
11	Vinay	Roy	Delhi	Kanpur	Ghaziabad	95	97	A1
16	Manoj	Gupta	Ghaziabad	Meerut	Chandigarh	95	90	B1
19	Ram	Gupta	Lucknow	Ghaziabad	Chandigarh	89	95	A2

Query 1: The following SELECT query uses the CHARACTER_LENGTH function with the First_Name column of the above Worker_Grade table:

SELECT First_Name, CHARACTER_LENGTH(First_Name) AS CHARACTER_LENGTH_FirstName FROM Worker_Grade;

This statement shows the length of the first name of each worker.

First_Name	CHARACTER_LENGTH_FirstName
Aman	4
Vishal	6
Raj	3
Yash	4
Vinay	5
Manoj	5
Ram	3

Query 2: The following SELECT query uses the CHARACTER_LENGTH function with the Last_Name column of the above Worker_Grade table:

SELECT Last_Name, CHARACTER_LENGTH(Last_Name) AS CHARACTER_LENGTH_LastName FROM Worker_Grade;

This statement shows the length of the last name of each worker.

Output:

Last_Name	CHARACTER_LENGTH_LastName
Sharma	6
Sharma	6
Gupta	5
Singhania	9
Roy	3
Gupta	5
Gupta	5

Query 3: The following SELECT query uses the CHARACTER_LENGTH function with the First_City and New_City columns of the above Worker_Grade table:

SELECT First_City, CHARACTER_LENGTH(First_City) AS CHARACTER_LENGTH_FirstCity, New_City, CHARACTER_LENGTH(New_City) AS CHARACTER_LENGTH_NewCity FROM Worker_Grade;

This SQL statement shows the length of the first and new city of each worker.

Output: