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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Functions | 25% | - Data type conversion: implicit and explicit - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Group functions and grouping data - Date arithmetic and date functions - Character functions for string manipulation |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Constraints management - Table structure, columns, data types - CREATE TABLE statement - Drop columns, set unused columns - Temporary and external tables - Views management |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operator precedence rules - Sorting query results - Arithmetic expressions and NULL values |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
Oracle Database 23ai SQL Associate Sample Questions:
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
- A. Department IDs that exist only in the employees table
- B. Department IDs that exist in both the departments and employees tables
- C. All department IDs from the departments table
- D. All department IDs from the employees table
Correct Answer: B 🗳️
Which type of join includes rows that do not have matching values in the joined table?
- A. INNER JOIN
- B. OUTER JOIN
- C. CROSS JOIN
- D. SELF JOIN
Correct Answer: B 🗳️
Which of the following SET operators combines results from two queries and removes duplicates?
- A. MINUS
- B. INTERSECT
- C. UNION
- D. UNION ALL
Correct Answer: C 🗳️
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
- A. Delete the department_id column in the employees table
- B. Delete all rows in the employees table
- C. Delete all rows where department_id is 20
- D. Raise an error because DELETE cannot use a WHERE clause
Correct Answer: C 🗳️
Which of the following data dictionary views provides information about constraints on tables?
- A. USER_CONSTRAINTS
- B. All of the above
- C. DBA_CONSTRAINTS
- D. ALL_CONSTRAINTS
Correct Answer: B 🗳️
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