Can you suggest me from where can i know everything about TSQL and MSSQL?
Knowing "everything" may take a little time....its a vast subject...try putting "TSQL" into a search engine....see how many results you get 😀
dependent upon what you know already...this series http://www.sqlservercentral.com/stairway/ may be worth reading.
Also...keep reading these forums / posting questions and also try to answer where possible ...its a great place to learn.
kind regards
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you can lead a user to data....but you cannot make them think
and remember....every day is a school day