T-SQL Tutorial - Complete Course

Introduction to T-SQL

What is T-SQL? Differences Between SQL and T-SQL Overview of Microsoft SQL Server Understanding Databases, Tables, and Schemas Connecting to SQL Server Management Studio (SSMS)

Working with Data

SELECT Statements and Basic Queries Filtering Data with WHERE Sorting Data with ORDER BY Limiting Results Using TOP and OFFSET FETCH Using Aliases for Columns and Tables Understanding NULL Values and Handling Them

Working with Multiple Tables

Understanding Relationships (Primary and Foreign Keys) INNER JOIN and Its Use Cases LEFT, RIGHT, and FULL OUTER JOINS CROSS JOIN and SELF JOIN Combining Results with UNION and UNION ALL Practical Examples of Multi-Table Queries

Using Built-in Functions

Scalar Functions (String, Date, and Mathematical) Conversion Functions (CAST, TRY_CAST, CONVERT) Conditional Functions (IIF, CHOOSE) Aggregate Functions (SUM, AVG, COUNT, MIN, MAX) Ranking Functions (ROW_NUMBER, RANK, DENSE_RANK, NTILE) Using Functions with GROUP BY and HAVING

Subqueries and Derived Tables

Introduction to Subqueries Scalar Subqueries vs. Multi-Valued Subqueries Correlated vs. Self-Contained Subqueries Using Subqueries in SELECT, FROM, and WHERE Clauses Derived Tables and Common Table Expressions (CTEs) Performance Considerations for Subqueries

Data Modification Statements

Inserting Data Using INSERT INTO Updating Data with UPDATE Deleting Data with DELETE Using MERGE for Upserts Truncating and Dropping Tables Managing Transactions with BEGIN TRAN, COMMIT, and ROLLBACK

Programmability in T-SQL

Understanding Variables and Data Types Using DECLARE, SET, and SELECT for Variables Control-of-Flow Statements (IF, WHILE, CASE) Using TRY...CATCH for Error Handling Working with Temporary Tables and Table Variables Using Dynamic SQL (EXEC, sp_executesql)

Stored Procedures, Functions, and Triggers

Introduction to Stored Procedures Creating and Executing Stored Procedures Creating User-Defined Functions (Scalar and Table-Valued) Creating and Managing Triggers (AFTER, INSTEAD OF) Passing Parameters to Procedures and Functions Managing Dependencies and Reusability

Advanced Query Techniques

Window Functions and OVER Clause Pivoting and Unpivoting Data Using Cursors in T-SQL Recursive Queries with CTEs Working with JSON and XML Data in T-SQL Writing Efficient and Optimized Queries

Database Security, Optimization, and Best Practices

Managing User Permissions and Roles Understanding Execution Plans Indexing and Its Impact on Performance Avoiding Common Query Pitfalls Backups, Restores, and Data Integrity T-SQL Best Practices and Coding Standards

Case Studies and Practical Projects

Creating and Managing a Simple Student Database Writing Queries for Business Reports Building and Executing a Stored Procedure for Payroll Data Validation Using Constraints and Triggers Performance Tuning of Slow Queries

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