difference between tsql, access sql and pl/sql
plsql, sql, t-sql
Solution
TSQL - Transact SQL PL/SQL - Is SQL for Oracle SQL Server Access SQL - Is a hacked version of SQL
TSQL and PL/SQL are both based off of SQL ISO/ANSI Standards. It depends on the version of SQL Server(TSQL) or Oracle(PL/SQL) for what ISO/ANSI version they are using. See http://en.wikipedia.org/wiki/SQL for more info.
TSQL and PL/SQL just have extra functionality beyond ISO/ANSI SQL put in by the companies that made them. In general the ISO/ANSI SQL standard deal specifically with how you can Query a database and what structures you can have in the database (e.g. tables, triggers, stored procs, etc). TSQL and PL/SQL are true programming languages in that they can do loops and other things that a programming languages can do. Simply put TSQL and PL/SQL are turing complete and the ISO standards are not.
I am not sure about Access. I think it is just a hacked up version of SQL.
Problem
i am very confused please help to clarify these differences! are they all completely different languages? what is the overlap?