SQL Server is available in various editions to meet different requirements

Enterprise: Designed for large-scale applications with high performance, scalability, and availability.

Standard: For mid-tier applications that need core database features but don’t require the full scalability of the Enterprise edition.

Standard: For mid-tier applications that need core database features but don’t require the full scalability of the Enterprise edition.

Express: A free, lightweight version suitable for small applications or development environments with limited features.

Developer: Includes all the features of the Enterprise edition but is licensed for development and testing, not production use.

Web: Designed for web hosting environments with lower costs for web-facing applications.

SQL Server Management Studio (SSMS) is an integrated environment provided by Microsoft to manage SQL Server infrastructure. It allows users to connect to SQL databases, write queries, manage databases, configure servers, and perform other administrative tasks.

Clustered Index: Stores the actual data rows at the leaf level of the index. There can be only one clustered index per table because it dictates the physical storage order of the rows.

Non-clustered Index: Contains a pointer to the actual data rather than the data itself. Multiple non-clustered indexes can exist on a single table, helping to speed up query performance.

SQL Server Agent is a component of SQL Server that is used to schedule jobs, monitor jobs, and automate tasks such as backups, index creation, and maintenance plans. It helps in managing routine administrative operations.