SQL Server Video Tutorial

Key Concepts Covered

• Introduction

  • Welcome to the tutorial.
  • Focus: Adventures in SQL Server including stored procedures and precautions.

• Basics of SQL Commands

  • SELECT Statement: Retrieve data from one or more tables.
  • WHERE Clause: Filter records based on conditions.
  • JOINs: Combine rows from two or more tables.
    • INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN.
  • GROUP BY: Group rows sharing a property to perform aggregate functions.
  • ORDER BY: Sort result set based on one or more columns.
  • LIMIT: Restrict the number of rows returned.

• Stored Procedures

  • Definition: A saved collection of SQL statements that can be reused.
  • Benefits: Improves performance, security, and reduces redundancy.
  • Creating a Procedure: CREATE PROCEDURE [ProcedureName] AS [SQL Statements].
  • Executing a Procedure: EXEC [ProcedureName] or CALL [ProcedureName].
  • Parameters: Accepting and using parameters within procedures.

• Query Examples

  • SELECT with WHERE clause
    • Example to display employee details with a salary greater than a specific amount.
  • Aggregation Functions: AVG(), SUM(), COUNT(), MIN(), MAX().
  • Using GROUP BY and HAVING
    • Example to find average salary by department.
  • Stored Procedure Creation: Steps to create and call a stored procedure for various operations.

• Advanced SQL Features

  • Window Functions: Perform calculations across a set of table rows related to the current row.
    • Example: ROW_NUMBER(), RANK(), DENSE_RANK(), NTILE(), etc.
  • Error Handling: Implementing try-catch for error management in SQL procedures.

• Practical Application

  • Database Connection: Connecting to the SQL server and authenticating with proper credentials.
  • Running SQL Scripts: Executing predefined and self-written SQL scripts for various operations.
  • Comments and Documentation: Importance of commenting and documenting SQL code for maintainability.

Wrap-Up

• Subscribe: Encouragement to subscribe to the channel for more tutorials.
• Comments and Feedback: Request for viewers to leave comments and feedback.
• Preview of Next Session: Brief on what will be covered next.