SQL Server String RIGHT() Function

SQL Server RIGHT() Function

The SQL Server RIGHT() function is used to extract a specified number of characters from the right side of a string. This function is useful for string manipulation tasks, such as extracting the last few characters of a string.

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Syntax

SELECT RIGHT(string, number_of_characters);

The RIGHT() function takes two arguments:

• string: The string from which to extract characters.
• number_of_characters: The number of characters to extract from the right side of the string.

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Example SQL Server RIGHT() Function Queries

Let's look at some examples of SQL Server RIGHT() function queries:

1. Basic RIGHT() Example

SELECT RIGHT('Hello World', 5) AS result;

This query extracts the last 5 characters from the string 'Hello World'. The result will be:

result
------
World

2. RIGHT() with a Column

SELECT first_name, RIGHT(first_name, 3) AS short_name
FROM employees;

This query extracts the last 3 characters from the first_name column for each employee. The result will show the first_name and the extracted substring as short_name.

3. RIGHT() with a Variable

DECLARE @myString VARCHAR(50);
SET @myString = 'SQL Server';
SELECT RIGHT(@myString, 6) AS result;

This query uses a variable to store a string and then extracts the last 6 characters from it. The result will be:

result
----------
Server

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Full Example

Let's go through a complete example that includes creating a table, inserting data, and using the RIGHT() function.

Step 1: Creating a Table

This step involves creating a new table named example_table to store some sample data.

CREATE TABLE example_table (
    id INT PRIMARY KEY,
    description VARCHAR(50)
);

In this example, we create a table named example_table with columns for id and description.

Step 2: Inserting Data into the Table

This step involves inserting some sample data into the example_table.

INSERT INTO example_table (id, description) VALUES (1, 'Apple');
INSERT INTO example_table (id, description) VALUES (2, 'Banana');
INSERT INTO example_table (id, description) VALUES (3, 'Cherry');

Here, we insert data into the example_table.

Step 3: Using the RIGHT() Function

This step involves using the RIGHT() function to extract characters from the description column.

SELECT id, description, RIGHT(description, 3) AS short_description
FROM example_table;

This query retrieves the id, description, and the last 3 characters of the description column for each row in the example_table. The result will be:

id  description  short_description
--- ------------ -----------------
1   Apple        ple
2   Banana       ana
3   Cherry       rry

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Conclusion

The SQL Server RIGHT() function is a powerful tool for extracting a specified number of characters from the right side of a string. Understanding how to use the RIGHT() function and its syntax is essential for effective string manipulation and data processing in SQL Server.