Some features may be version-specific (e.g., In-Memory OLTP, graph tables, temporal tables).
To understand why a query is slow, SSMS can generate a Graphical Execution Plan. This visual map shows how the SQL Server query optimizer executed the script. It highlights "expensive" operations, such as table scans, and often suggests missing indexes that could speed up the query. SQL Server Profiler sql server management studio ssms
For developers, SSMS offers: