MySQL query to get the character length for all the values in a column?

To get the character length, use the CHAR_LENGTH() method. Let us first create a table −

mysql> create table DemoTable
   -> (
   -> Name varchar(100)
   -> );
Query OK, 0 rows affected (1.04 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('John');
Query OK, 1 row affected (0.13 sec)

mysql> insert into DemoTable values('Robert');
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable values('Bob');
Query OK, 1 row affected (0.20 sec)

mysql> insert into DemoTable values('David');
Query OK, 1 row affected (0.15 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

Output

This will produce the following output −

+--------+
| Name   |
+--------+
| John   |
| Robert |
| Bob    |
| David  |
+--------+
4 rows in set (0.00 sec)

Get the character length −

mysql> select char_length(Name) from DemoTable;

Output

This will produce the following output −

+-------------------+
| char_length(Name) |
+-------------------+
| 4                 |
| 6                 |
| 3                 |
| 5                 |
+-------------------+
4 rows in set (0.00 sec)