1Z1-171 Certified Questions & 1Z1-171 Dumps Download

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Oracle 1Z1-171 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Displaying Data from Multiple Tables	10%	- Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products
Topic 2: Using Subqueries	5%	- Single-row and multi-row subqueries - Correlated subqueries for update and delete
Topic 3: Using SET Operators	5%	- UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements
Topic 4: DDL for Tables and Relationships	15%	- Temporary and external tables - Table structure, columns, data types - Views management - Constraints management - Drop columns, set unused columns - CREATE TABLE statement - TRUNCATE TABLE statement
Topic 5: Using Functions	25%	- Data type conversion: implicit and explicit - Restricting group results - Character functions for string manipulation - Group functions and grouping data - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions - Nested functions
Topic 6: Managing Indexes, Synonyms, Sequences	5%	- Create and manage indexes - Create and manage synonyms - Create and manage sequences
Topic 7: Relational Database Concepts	5%	- SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL
Topic 8: Retrieving and Sorting Data	15%	- Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Sorting query results - Operator precedence rules - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword
Topic 9: Managing Tables with DML	5%	- Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations
Topic 10: Data Dictionary and Time Zones	5%	- CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types
Topic 11: Controlling User Access	5%	- Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment

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Oracle Database 23ai SQL Associate Sample Questions (Q37-Q42):

NEW QUESTION # 37
What does the EXISTS operator check in a subquery?

A. If the subquery returns a specific number of rows
B. If the subquery contains only unique values
C. If the subquery references the outer query
D. If the subquery returns any rows

Answer: D

NEW QUESTION # 38
Which function is used to extract the year from a date in SQL?

A. YEAR(date)
B. GET_YEAR(date)
C. EXTRACT(YEAR FROM date)
D. TO_YEAR(date)

Answer: C

NEW QUESTION # 39
What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);

A. Employee IDs from department 10
B. All employee IDs
C. Employees with salaries greater than 10
D. Employee IDs from departments with no employees

Answer: B

NEW QUESTION # 40
Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?

A. CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY -100;
B. CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY -10;
C. CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY 10;
D. CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY 100;

Answer: C

NEW QUESTION # 41
What does the following SQL statement do?
SELECT e.employee_id, d.department_name
FROM employees e
JOIN departments d ON e.department_id = d.department_id;

A. Retrieves all employees and their departments
B. Retrieves employees and departments with matching department_id
C. Retrieves only departments with no employees
D. Retrieves only employees without departments

Answer: B

NEW QUESTION # 42
......

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