Sql,oracle,mysql.... ?

Question

This 3 will do same work. access and manipulate the data. then why they kept differet name..........

Answer 1

ocale is a company
mysql is software for database management.
sql is a programing language typicaly used for databases.

Answer 2

They are three different entities.
SQL(Structured Query Language): Used to manipulate(insert, update, delete, merge and select) data from database.
Oracle: An establishment just like Microsoft that is involve into many things like (having it's own operating system Linux and Solaris, database software known as Oracle database, having its own programming language known as java, etc.)
MySQL: A database application used to manage databases.