Differences between SQL, T-SQL, and PL-SQL are as follows:
• SQL is abbreviated as Standard Query Language.
• It has been adopted by ANSI.
• This is used by many RDBMS (Relational Database Management System) vendors.
• Both T-SQL and PL-SQL are nothing but the extensions of SQL.
• T-SQL is abbreviated as Transact-Structured Query Language.
• This is Microsoft’s product.
• This works well with Microsoft SQL Server.
• T-SQL offers the degree of control for how an application works.
• PL-SQL is abbreviated as Procedural Language-Structured Query Language.
• This is Oracle’s Product.
• This works well with the Oracle database server.
• PL-SQL integrates well with the SQL.
• PL-SQL is designed to extend SQL's abilities while it can be integrated well with SQL. Different features like local variables and string/data processing are added which makes the language Turing-complete.