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Oracle Database 23ai SQL Associate Sample Questions:

1. What happens if a DELETE statement is executed without a WHERE clause?

A) An error is raised.
B) All rows in the table are deleted.
C) No rows are deleted.
D) Only the first row is deleted.

2. What is the purpose of the SAVEPOINT statement?

A) To restart a transaction
B) To set a point within a transaction to which a rollback can occur
C) To save changes permanently
D) To delete data temporarily

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

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

4. What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);

A) Creates a temporary table
B) Creates a table with a primary key and a NOT NULL constraint
C) Creates a table with only VARCHAR2 and DATE columns
D) Creates a table with no constraints

5. Which clause is used to ensure that only specific rows are deleted in a DELETE statement?

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

Solutions: