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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Using Functions | 25% | - Character functions for string manipulation - Group functions and grouping data - Date arithmetic and date functions - Nested functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Views management - Drop columns, set unused columns - CREATE TABLE statement - Temporary and external tables - Table structure, columns, data types - Constraints management |
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operator precedence rules - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Sorting query results - Limiting rows and substitution variables - DEFINE and VERIFY commands |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
Oracle Database 23ai SQL Associate Sample Questions:
1. What is the difference between UNION and UNION ALL?
A) UNION combines columns, while UNION ALL combines rows.
B) UNION removes duplicates, while UNION ALL includes all rows, including duplicates.
C) UNION includes all rows, while UNION ALL removes duplicates.
D) UNION works with subqueries, while UNION ALL does not.
2. What is the purpose of using external tables in Oracle Database?
A) To store backup copies of database tables
B) To create temporary tables for session-specific data
C) To improve the performance of complex queries
D) To manage data stored in external files using SQL
3. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
A) Both functions are identical in output.
B) LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
C) LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.
D) LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
4. Which SET operator returns rows from the first query that are not present in the second query?
A) UNION ALL
B) INTERSECT
C) MINUS
D) UNION
5. What is the purpose of the DBA_OBJECTS data dictionary view?
A) To monitor system performance
B) To show the current session details
C) To provide information about all objects in the database
D) To list all users in the database
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: D | Question # 3 Answer: B | Question # 4 Answer: C | Question # 5 Answer: C |
