SQL*Plus is a tool for entering and running ad-hoc database statements. The communication with which any room identified and access can be called as a tool, here SQL*Plus is another tool of communication to Oracle Database.
DATA may be defined as information, processed information and many attributes can be attached to DATA.
SQL Statements are used to perform all the operations in an oracle database. SQL statement is a group of string, sentence which consists of words. Though it seems to be very simple, but powerful computer program or instruction to access oracle database. SQL statements are divided into four categories: When you enter into the living room, on the right side you can find entry to kitchen and on the left side you shall find an entry to bed room. It is a statement to get access the objects of room in the house database. The same thing can be expressed in different language by my neighbor so as the SQL Statement is nothing but a statement to access Oracle Database.