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Simulation test system

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Oracle 1Z1-171 Exam Syllabus Topics:

Section	Objectives
Topic 1: Using Joins	- Use cross joins - Use equijoins and non-equijoins - Use outer joins (LEFT, RIGHT, FULL) - Use self-joins
Topic 2: Using Subqueries	- Use single-row subqueries - Use correlated subqueries - Use multiple-row subqueries
Topic 3: Using SQL Functions	- Use character, number, and date functions in SELECT statements - Use conversion functions
Topic 4: Using DDL Statements	- Create and manage constraints - Create and manage tables - Create and manage indexes - Create and manage sequences - Create and manage views
Topic 5: Controlling User Access	- Grant and revoke privileges - Differentiate system privileges from object privileges - Create and manage roles
Topic 6: Using DML Statements	- Control transactions - Insert rows into a table - Delete rows from a table - Use the MERGE statement - Update rows in a table
Topic 7: Using SELECT Statements	- Use the WHERE clause to restrict rows - Use the FETCH clause to limit rows returned - Execute a basic SELECT statement - Use the ORDER BY clause to sort rows
Topic 8: Using Set Operators	- Use UNION, UNION ALL, INTERSECT, and MINUS operators

Oracle Database 23ai SQL Associate Sample Questions:

1. Which command grants a user the ability to query data from a specific table?

A) GRANT ALL ON table_name TO user_name;
B) ENABLE SELECT ON table_name TO user_name;
C) ALLOW SELECT ON table_name TO user_name;
D) GRANT SELECT ON table_name TO user_name;

2. What is the purpose of a correlated subquery?

A) A subquery that combines data from multiple tables
B) A subquery that depends on the result of another subquery
C) A subquery that can be used only with aggregate functions
D) A subquery that references columns from the outer query

3. What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);

A) Return employees with a salary above the average salary
B) Return employees with a salary below the average salary
C) Return employees with a salary equal to the average salary
D) Return all employees and their salaries

4. What is the primary purpose of a primary key in a relational database?

A) To uniquely identify each record in a table
B) To establish relationships between tables
C) To sort data in ascending order
D) To store duplicate data in a table

5. What is the result of using the following SQL query?
SELECT 100 + NULL AS result;

A) 100
B) An error
C) 0
D) NULL

Solutions:

Question # 1
Answer: D

Question # 2
Answer: D

Question # 3
Answer: A

Question # 4
Answer: A

Question # 5
Answer: D