SQL String Functions RTRIM Function

The RTRIM function is a SQL string function that removes all the blank spaces from the end (right side) of a string. It is commonly used to clean up data before performing operations or comparisons.

Syntax

The syntax for the RTRIM function is as follows:

RTRIM(string)

Where string is the input string that you want to remove the spaces from.

Example

Let's assume we have a table named employees with a column named name that may contain extra spaces at the end of each name. We can use the RTRIM function to remove those spaces as shown below:

SELECT RTRIM(name) AS trimmed_name
FROM employees

Output

The output of the example query above would be a list of trimmed names (with no trailing spaces) from the employees table.

| trimmed_name |
|--------------|
| John         |
| Jane         |
| Bob          |

Explanation

In the example above, we used the RTRIM function to remove all blank spaces from the right side of each value in the name column of the employees table. The function is applied to each row in the table, and the result is a new column named trimmed_name that contains the cleaned up names.

Use

The RTRIM function is most commonly used to clean up data before performing operations or comparisons. It can be used in combination with other SQL string functions like LTRIM and TRIM to remove spaces from both sides of a string.

Important Points

• The RTRIM function only removes blank spaces, not other whitespace characters like tabs or line breaks.
• The input to the RTRIM function must be a string data type.
• The output of the RTRIM function is also a string data type.
• The RTRIM function is case-sensitive, so it will only remove spaces from the right side of a string.

Summary

The RTRIM function is a useful SQL string function that removes all the blank spaces from the end of a string. It is commonly used to clean up data before performing operations or comparisons. Its syntax is straightforward and easy to use, and it can be combined with other SQL string functions to remove spaces from both sides of a string.