SQL LEN () function

The LEN () function

LEN () function returns the length of the text field values.

SQL LEN () syntax

SELECT LEN(column_name) FROM table_name;

MySQL in function LENGTH ():

SELECT LENGTH(column_name) FROM table_name;

The demo database

In this tutorial, we will use w3big sample database.

The following is a selected "Websites" table data:

+----+--------------+---------------------------+-------+---------+
| id | name         | url                       | alexa | country |
+----+--------------+---------------------------+-------+---------+
| 1  | Google       | https://www.google.cm/    | 1     | USA     |
| 2  | 淘宝          | https://www.taobao.com/   | 13    | CN      |
| 3  | 本教程      | http://www.w3big.com/    | 4689  | CN      |
| 4  | 微博          | http://weibo.com/         | 20    | CN      |
| 5  | Facebook     | https://www.facebook.com/ | 3     | USA     |
| 7  | stackoverflow | http://stackoverflow.com/ |   0 | IND     |
+----+---------------+---------------------------+-------+---------+

SQL LEN () examples

The following SQL statement to select the length of the "name" and "url" column values ​​from the "Websites" table:

Examples

SELECT name, LENGTH(url) as LengthOfURL
FROM Websites;

Execute the above SQL output results are as follows: