| Tool | Primary Use | Key Focus | |------|--------------|------------| | (SQL Server Management Studio) | Operational management, ad-hoc queries, troubleshooting | Connecting to live databases | | SSDT (SQL Server Data Tools) | Development, version control, automated deployment | Designing offline database schemas |

SSDT compiles the project. If you refer to a missing column or wrong data type, you get a compile-time error (just like C#). No more runtime surprises.

SSDT compares your project's ideal schema against a target database (dev, staging, production). It automatically generates the exact ALTER scripts needed to synchronize them—without dropping data.