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Oracle Database 23ai SQL Associate Sample Questions:

1. Which of the following data dictionary views provides information about constraints on tables?

A) All of the above
B) ALL_CONSTRAINTS
C) DBA_CONSTRAINTS
D) USER_CONSTRAINTS

2. Which clause in an UPDATE statement typically uses a subquery to assign values to columns?

A) SET
B) WHERE
C) FROM
D) HAVING

3. Which of the following ensures that a relational database enforces data integrity?

A) Indexes on all columns
B) Constraints such as primary keys, foreign keys, and unique constraints
C) Redundant data storage
D) Hierarchical data organization

4. Which SQL keyword is used to remove duplicate rows from the result set of a query?

A) UNIQUE
B) DISTINCT
C) ONLY
D) DISTINCTROW

5. What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;

A) The time part of the current date
B) The current date in the default system format
C) The current date in the format 'DD-MM-YYYY'
D) An error

Solutions: