The following are the three language components of a database management system (DBMS).
I. Data Definition Language (DDL).
II. Sub-schema DDL.
III. Data Manipulation Language.
Two different types of people (users and practioners) are concerned with them. Which of them do users of a DBMS usually deal with?
(a)Only (I) above
(b)Only (III) above
(c)Both (I) and (II) above
(d)Both (II) and (III) above
(e)All (I), (II) and (III) above.
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