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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Sorting query results - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operator precedence rules |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Using Functions | 25% | - Nested functions - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - Restricting group results |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| DDL for Tables and Relationships | 15% | - Table structure, columns, data types - TRUNCATE TABLE statement - CREATE TABLE statement - Temporary and external tables - Constraints management - Drop columns, set unused columns - Views management |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
Oracle Database 23ai SQL Associate Sample Questions:
1. What does the INTERSECT operator do in SQL?
A) Combines rows from two queries and includes all duplicates
B) Returns rows that are present in both queries
C) Returns rows from the first query that are not present in the second query
D) Combines all rows from two queries without any conditions
2. Which command revokes a user's privilege to update a table?
A) REVOKE 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) DENY UPDATE ON table_name FROM user_name;
3. Which statement can be used to undo changes made in a transaction?
A) COMMIT
B) MERGE
C) ROLLBACK
D) SAVEPOINT
4. How can you ensure that data is sorted in descending order in a SQL query?
A) Use the ASC keyword
B) Use the DISTINCT keyword
C) Use the DESC keyword
D) Use the ORDER keyword
5. What is the purpose of the MERGE statement in SQL?
A) To delete duplicate rows from a table
B) To combine the results of two queries
C) To join two tables into one
D) To update existing rows or insert new rows in a target table
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: C | Question # 4 Answer: C | Question # 5 Answer: D |
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