Answer:
The answer to this question is option "d".
Explanation:
In this question option d (A user fills out a form to construct a description of the data desired in a SQL search) is not true. Because SQL stands for Structured Query Language. This is a query language used to communicate with a database and a user fills the form. Which is not possible in the SQL. So the option d is not true.
Answer: 3
Explanation:
Because X = 18 and our condition given to the code if > and < which do not match with the input so it prints 3.
Answer:
Join
Explanation:
Five basic set operators in relational algebra are as follows:
- Selection - tuple selection
- Projection - extract columns
- Cartesian product - cross product of relations
- Set union - union of two relations
- Set difference - minus operation on two relations
As we can see, Join is not part of the basic set operations but it is implemented using the Cartesian Product operator.
