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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - Views management - CREATE TABLE statement - TRUNCATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - Constraints management |
| Using Functions | 25% | - Restricting group results - Group functions and grouping data - Date arithmetic and date functions - Character functions for string manipulation - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions |
| Retrieving and Sorting Data | 15% | - Sorting query results - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - Operator precedence rules |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
Oracle Database 23ai SQL Associate Sample Questions:
1. What is a subquery in SQL?
A) A query inside another query
B) A query used for joining two or more tables
C) A query that combines data from multiple tables
D) A query used to create a table
2. What does the COMMIT statement do in SQL?
A) Discards all pending changes in the transaction
B) Rolls back changes to a previous state
C) Saves all pending changes to the database permanently
D) Begins a new transaction
3. Which function returns the current system date and time in the database session's time zone?
A) CURRENT_TIMESTAMP
B) LOCAL_TIME
C) SYSTEM_TIME
D) SYSDATE
4. Which of the following is a valid reason to create a synonym?
A) To enforce unique constraints on a table
B) To provide simplified and consistent access to an object
C) To improve query performance
D) To automatically generate numeric values for a column
5. Which command revokes a user's privilege to update a table?
A) DENY UPDATE ON table_name FROM user_name;
B) DELETE UPDATE ON table_name FROM user_name;
C) REMOVE UPDATE ON table_name FROM user_name;
D) REVOKE UPDATE ON table_name FROM user_name;
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: C | Question # 3 Answer: A | Question # 4 Answer: B | Question # 5 Answer: D |
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