How many types of database languages?
a) one
b) two
c) three
d) four
Explanation: data definition language, data manipulation language
Which of the following language is used to specify database schema?
a) data definition language
b) data manipulation language
c) database language
d) none of these
Which of the following language is for basic manipulation an operation is called?
a) database language
b) data definition language
c) data manipulation language
d) none of these
How many types of data manipulation language?
a) one
b) two
c) three
d) four
Explanation: procedural data manipulation language, Nonprocedural data manipulation language
How many categories in relational algebra?
a) one
b) two
c) three
d) four
Explanation: Unary operations, Binary operations
How many types of unary operations?
a) one
b) two
c) three
d) four
Explanation: selection operation, projection operation
