SQL

You can learn database administration and programming on websites as well as via video lectures. You should pursue B.Tech in computer science. In CSE, you will learn all about programming and database, data structures, etc.

You should do SQL it would be better after completion in specialisation in Oracle.

I think you should be before SQL server languages, because through SQL, you can go for web development and web designing, and also even in Oracle.

I think you should go for online courses of SQL. You can go on sites, like We Schools. There are many more sites, which is providing online SQL courses.

You can join any institute which are teaching programming in database, because in Noida there are many institute which are teaching programming and other courses also. Which you may get suitable, you should opt for.

1 eTechGuys
Kolkata - Sech Bhavan
2 BRSP Technologies
Kolkata - Bidhan Nagar
3 Palium
Kolkata - Jodhpur Park
4 EnrichFlair
Kolkata – Ballygunge
Above are some of the institutes in Kolkata for Oracle PL/SQL. Rank 1 and 2 institutes mentioned above are good.

SQL is a single certification
Important question is - Which is the right place to do SQL course
You can get the list of training center but I want to suggest you that you should visit at Koenig Solutions training center.

I would love to share few books name:-
SQL Practice Problems: 57 beginning, intermediate, and advanced challenges for you to solve using a 'learn-by-doing' approach:- The ability to work with data and write SQL is currently one of the most in-demand job skills.
T-Sql Querying:- Squeeze maximum perfor

Learning any one programming language, completely is a better idea. However, you should know the basics of at least 3-4 other languages. It's easier when you've mastered even one. Be a jack of all and a master of at least one.