Creating a Stored Procedure for Paginated Results

Create a Stored Procedure with Pagination

Write a SQL query to create a stored procedure that retrieves paginated results from a table.

Solution:

-- Create a stored procedure for paginated results.
CREATE PROCEDURE GetPaginatedEmployees
    @PageNumber INT, -- Input parameter for the page number.
    @PageSize INT -- Input parameter for the number of rows per page.
AS
BEGIN
    SELECT * 
    FROM Employees
    ORDER BY EmployeeID
    OFFSET (@PageNumber - 1) * @PageSize ROWS
    FETCH NEXT @PageSize ROWS ONLY;
END;

Explanation:

1. Purpose of the Query :

1. The goal is to create a stored procedure that retrieves a subset of rows (pagination) from the Employees table based on user-defined page size and page number.

2. Key Components :

1. OFFSET and FETCH : Implements pagination by skipping rows and fetching a specific number of rows.
2. ORDER BY : Ensures consistent ordering for paginated results.

3. Why use Pagination? :

1. Pagination improves performance and usability when working with large datasets by retrieving only a portion of the data at a time.

Real-World Application :

1. For example, in web applications, you might use this procedure to display employees in chunks (e.g., 10 per page) for better user experience.

Additional Notes:

• Always include an ORDER BY clause to ensure consistent results across pages.
• Use this exercise to demonstrate how to handle large datasets efficiently.

For more Practice: Solve these Related Problems:

• Write a SQL query to create a stored procedure that retrieves paginated results sorted by a user-specified column.
• Write a SQL query to create a stored procedure that allows users to define both page size and sort order for paginated queries.
• Write a SQL query to create a stored procedure that supports filtering options along with pagination for large datasets.
• Write a SQL query to create a stored procedure that combines pagination with grouping and aggregation functions.

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