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Oracle 1Z0-171 Exam Syllabus Topics:

Oracle Database 23ai SQL Associate Sample Questions:

1. What is a SELF JOIN in SQL?

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

2. What is the relationship between SQL and a relational database?

A) SQL is a standard query language used to interact with relational databases
B) SQL is a file system used to store relational database data.
C) SQL is a scripting language used for file manipulation.
D) SQL is used to create flat file databases.

3. What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;

A) Increase the salary of all employees by 10%
B) Set the salary to 1.1 for employees in department 10
C) Increase the salary of employees in department 10 by 10%
D) Decrease the salary of employees in department 10 by 10%

4. Which type of subquery returns exactly one value?

A) Scalar subquery
B) Inline view
C) Correlated subquery
D) Multiple-row subquery

5. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?

A) LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
B) LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.
C) LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
D) Both functions are identical in output.

Solutions: