Oracle/DB

Kindly refer to this link:
https://docs.oracle.com/cd/B28359_01/server.111/b28310/dba001.htm

Indian IT industry prefers B.Tech CSE/IT, MCA, BCA, B.Sc CS/IT graduates for technical roles. Therefore, you may face challenges in getting technical roles in IT companies. You are advised to do MCA for a meaningful IT career.

Oracle offers a complete, integrated set of application development tools that support any development approach, technology platform, or operating system. Oracle PL/SQL Developer Certified Associate is industry recognised certification which helps in career opportunities as application developers. You can also do Oracle Database Administration (DBA) certification also to take DBA career.
You can also do similar professional courses for DB2 and SQL servers also which are equally popular RDBMS.

If you are planning to be an application developer, you must do courses on both Oracle and .NET.

To learn web designing, you should first learn HTML.To learn software development languages, you should first learn C language.

You are advised to do either hardware or software certifications along with BCA to enhance your employability, based on your interests and preferences.

You can join any of the following institutes:
SQL Star International Limited
e-gain.co.in
SEED Infotech Ltd., Mumbai
Core Database Systems