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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Drop columns, set unused columns - CREATE TABLE statement - Views management - Table structure, columns, data types - Constraints management - Temporary and external tables |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Group functions and grouping data - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Restricting group results |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Operator precedence rules - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Sorting query results - DEFINE and VERIFY commands - Limiting rows and substitution variables |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
Oracle Database 23ai SQL Associate Sample Questions:
What does the NEXTVAL pseudocolumn do in SQL?
- A. Deletes the sequence from the database
- B. Retrieves the next value in a sequence and increments the sequence
- C. Resets the sequence to its starting value
- D. Retrieves the current value of a sequence without incrementing it
Correct Answer: B 🗳️
What does the COMMIT statement do in SQL?
- A. Begins a new transaction
- B. Saves all pending changes to the database permanently
- C. Rolls back changes to a previous state
- D. Discards all pending changes in the transaction
Correct Answer: B 🗳️
What is the result of using the following SQL query?
SELECT 100 + NULL AS result;
- A. 100
- B. An error
- C. NULL
- D. 0
Correct Answer: C 🗳️
Which of the following can be achieved using a correlated subquery?
- A. Inserting data into a table
- B. Retrieving duplicate records from a single table
- C. Joining two tables without a common column
- D. Comparing each employee's salary to the average salary of their department
Correct Answer: D 🗳️
Which command creates a new role in Oracle Database?
- A. CREATE NEW ROLE role_name;
- B. ADD ROLE role_name;
- C. CREATE ROLE role_name;
Correct Answer: C 🗳️
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