SQL LOWER Function | Convert Text to Lowercase

SQL LOWER is an inbuilt Function in SQL Server. It converts a text to lowercase in SQL Server. In this article, we will discuss the SQL LOWER Function. Also, we will discuss a few examples of using it.

Also, you can convert text to uppercase using SQL UPPER Function.

Syntax

LOWER (string)

Parameters

The Function expects only one parameter. You need to pass the string you need to convert in lowercase as the parameter.

Return Value

The function returns the input string to lowercase.

Support

The function works in SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, and Parallel Data Warehouse.

Examples

Let’s see some examples to use the function in queries.

Example 1: Basic Query

You can use the LOWER Function to convert a string to lowercase.

SELECT LOWER('BRINGING KNOWLEDGE TOGETHER') as lowerCase;
+-----------------------------+
| lowerCase                   |
+-----------------------------+
| bringing knowledge together |
+-----------------------------+
1 row in set (0.00 sec)

Example 2: SELECT Query

You can use the Lower Function in SELECT statements to fetch data from database.

SELECT LOWER(user_name) as lowerUserName FROM user_description;
+---------------+
| lowerUserName |
+---------------+
| chandler      |
| monica        |
| ross          |
+---------------+

Example 3: UPDATE Query

You can also update the existing fields in a table using the function in an UPDATE Query.

UPDATE user_description SET user_name = LOWER(user_name);
Query OK, 3 rows affected (0.07 sec)
Rows matched: 3  Changed: 3  Warnings: 0

SELECT user_name FROM user_description;
+-----------+
| user_name |
+-----------+
| chandler  |
| monica    |
| ross      |
+-----------+

Conclusion

In this article, we discussed the LOWER Function. It converts a text to lowercase in SQL Server. You can read more about it on the Official Microsoft Documentation. Also, read more about SQL Server on Concatly.

Also, you can convert text to uppercase using SQL UPPER Function.