SQL LEN() function
The LEN() function returns the length of the value in the text field.
SQL LEN() syntax
SELECT LEN(column_name) FROM table_name;
Demonstrate the database
In this tutorial, we'll use the well-known Northwind sample database.
Here's the data from the "Customers" table:
CustomerID | CustomerName | ContactName | Address | City | PostalCode | Country |
---|---|---|---|---|---|---|
1
|
Alfreds Futterkiste | Maria Anders | Obere Str. 57 | Berlin | 12209 | Germany |
2 | Ana Trujillo Emparedados y helados | Ana Trujillo | Avda. de la Constitución 2222 | México D.F. | 05021 | Mexico |
3 | Antonio Moreno Taquería | Antonio Moreno | Mataderos 2312 | México D.F. | 05023 | Mexico |
4
|
Around the Horn | Thomas Hardy | 120 Hanover Sq. | London | WA1 1DP | UK |
5 | Berglunds snabbköp | Christina Berglund | Berguvsvägen 8 | Luleå | S-958 22 | Sweden |
SQL LEN() instance
The following SQL statement selects the length of the median values in the "CustomerName" and "Address" columns from the "Customers" table:
FROM Customers;