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Oracle Database 23ai SQL Associate Sample Questions:

1. What is the default order of evaluation when multiple SET operators are used in a query?

A) UNION, MINUS, INTERSECT
B) INTERSECT, MINUS, UNION
C) INTERSECT, UNION, MINUS
D) UNION, INTERSECT, MINUS

2. What is required for the queries combined by a SET operator to work correctly?

A) The result sets must have the same number of columns and compatible data types.
B) Both queries must include the WHERE clause.
C) Both queries must use the GROUP BY clause.
D) The tables must be joined using a primary key.

3. Which component of an ERD (Entity-Relationship Diagram) represents the attributes of an entity?

A) Arrows
B) Rectangles
C) Ovals
D) Diamonds

4. What is a SELF JOIN in SQL?

A) A join of a table with itself
B) A join that does not require a WHERE clause
C) A join used for Cartesian products
D) A join between tables with identical structures

5. What is a role in Oracle Database?

A) A database object used to enforce constraints
B) A predefined SQL statement stored in the database
C) A user-defined function
D) A set of privileges that can be granted to users or other roles

Solutions: