SQL Server is Microsoft’s relational database management software and uses a common set of tools to deploy and manage databases both on-premises and in the cloud.
Microsoft SQL Server Management Studio is a rich, integrated administrative client designed to meet the SQL Server and Azure SQL Database administrator's server management requirements. In Management Studio, administrative tasks are accomplished using Object Explorer, which allows you to connect to any server in the SQL Server family and graphically browse its contents. A server can be an instance of the Database Engine, Analysis Services, Reporting Services, Integration Services or Azure SQL Database.
The tool components of Management Studio include Registered Servers, Object Explorer, Solution Explorer, Template Explorer, the Object Explorer Details page, and the document window.
Use Management Studio to:
Connect to an instance of the Database Engine, SSAS, SSRS, SSIS or Azure SQL Database.
Configure server properties.
Manage database and SSAS objects such as cubes, dimensions, and assemblies.
Create objects, such as databases, tables, cubes, database users, and logins.
Manage files and filegroups.
Attach or detach databases.
Launch scripting tools.
View system logs.
Monitor current activity.
Manage full-text indexes.
SQL Server Data Tools (SSDT) is a modern development tool for building SQL Server relational databases, databases in Azure SQL, Analysis Services (AS) data models, Integration Services (IS) packages, and Reporting Services (RS) reports. With SSDT, you can design and deploy any SQL Server content type with the same ease as you would develop an application in Visual Studio.
T-SQL, which stands for Transact-SQL and is sometimes referred to as TSQL, is an extension of the SQL language used primarily within Microsoft SQL Server. This means that it provides all the functionality of SQL but with some added extras.