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✅ Introduction to CTEs – Understand the purpose and syntax of Common Table Expressions in SQL Server. 🔄 CTE Syntax Breakdown – Learn how to use the WITH clause to define temporary result sets. 📄 CTE vs. Derived Tables – Clear comparison showing how CTEs offer improved readability and reusability over nested subqueries. 📈 Using … Read more
✅ Introduction to CTEs – Understand the purpose and syntax of Common Table Expressions in SQL Server. 🔄 CTE Syntax Breakdown – Learn how to use the WITH clause to define temporary result sets. 📄 CTE vs. Derived Tables – Clear comparison showing how CTEs offer improved readability and reusability over nested subqueries. 📈 Using … Read more
DDL (Data Definition Language) DDL is used to define and modify database structures (schemas). Main DDL commands: CREATE, ALTER, DROP, TRUNCATE, RENAME. CREATE is used to make new tables, views, stored procedures, functions, etc. ALTER modifies existing objects like adding/dropping columns, changing data types. DROP permanently deletes database objects. TRUNCATE removes all rows from a … Read more
Types of Joins INNER JOIN – Returns matching rows from both tables. LEFT JOIN (LEFT OUTER JOIN) – Returns all rows from the left table + matching rows from the right. RIGHT JOIN (RIGHT OUTER JOIN) – Returns all rows from the right table + matching rows from the left. FULL OUTER JOIN – Returns … Read more
1. SQL Server Installation Steps to install SQL Server: Download and install SQL Server Developer Edition or Express Edition from Microsoft. Configure SQL Server setup (choose authentication mode). Install SQL Server Management Studio (SSMS) to interact with the database. Connect to the SQL Server instance using SSMS. SSMS Installation (SQL Server Management Studio) SSMS is used to manage SQL Server databases … Read more
1. SQL Server Installation Steps to install SQL Server: Download and install SQL Server Developer Edition or Express Edition from Microsoft. Configure SQL Server setup (choose authentication mode). Install SQL Server Management Studio (SSMS) to interact with the database. Connect to the SQL Server instance using SSMS. SSMS Installation (SQL Server Management Studio) SSMS is … Read more
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