What is a T-SQL query?

Question

In the Stack Exchange Data Explorer, specifically in the first line it says:

Click the Compose Query button up there and start Typing your T-SQL query [...]

That in free translation would be:

Click on the Compose button Query above and start typing your query T-SQL [...]

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• What is a T-SQL query?
• How she differs from a query normal?
• What bank uses that query T-SQL?

Answer 1

Transact-SQL, abbreviated as T-SQL is owned by Microsoft and Sybase for the SQL extension.

What is a T-SQL query?

One query of SQL adapted for SQL Server.

How it differs from a normal query?

• Control of tongue flow
• Local Variables
• Various functions supporting string processing, dates, math, etc.
• Improvement to the declaration DELETE and UPDATE

Which database uses this T-SQL query?

SQL Server.

Source