T-SQL

T-SQL is advancement of SQL. It  include  procedural programming, local variables, various support functions for string processing, date processing, mathematics, etc. and changes to the DELETE and UPDATE statements.

For Basic Queries of SQL ,see Basic Queries.
and for more

• Defining Variables in T-SQL
• Data Types in SQL Server
• Operators in SQL Server
• Control Statements in T-SQL
• Database Creation using T-SQL
• Basics of Stored Procedure
• Error Handling in T-SQL
• Functions in SQL Server
• Basics of Triggers
• Basics of Indexes
• FOR XML CLAUSE
• Handling NULL Values in SQL Server
• Where to use SQL Server Cursor