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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Views management - Constraints management - Drop columns, set unused columns - Table structure, columns, data types - Temporary and external tables - TRUNCATE TABLE statement |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Using Functions | 25% | - Group functions and grouping data - Restricting group results - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Nested functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - ROUND, TRUNC, MOD functions |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Limiting rows and substitution variables - Sorting query results - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Operator precedence rules |
| 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% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
Oracle Database 23ai SQL Associate Sample Questions:
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;
- A. Returns only the employees with salaries and bonuses
- B. Returns only employees with duplicate employee IDs in both tables
- C. Combines the salaries and bonuses for employees, removing duplicates
- D. Combines all employee IDs, salaries, and bonuses, including duplicates
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
- A. Delete the department_id column in the employees table
- B. Raise an error because DELETE cannot use a WHERE clause
- C. Delete all rows in the employees table
- D. Delete all rows where department_id is 20
Which data dictionary view provides information about all tables accessible to the current user?
- A. ALL_TABLES
- B. SESSION_TABLES
- C. USER_TABLES
- D. DBA_TABLES
Which clause is used to allow a user to grant a privilege to others?
- A. WITH GRANT OPTION
- B. WITH SELECT OPTION
- C. WITH SHARE OPTION
- D. WITH ADMIN OPTION
In a relational database, what is a foreign key?
- A. A key used to sort data in a specific order
- B. A unique identifier for a record in a table
- C. A key that is used to establish a relationship between two tables
- D. A temporary key generated during query execution
