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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| 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% | - Drop columns, set unused columns - Temporary and external tables - Constraints management - CREATE TABLE statement - TRUNCATE TABLE statement - Table structure, columns, data types - Views management |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operator precedence rules - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Sorting query results - Arithmetic expressions and NULL values - DEFINE and VERIFY commands |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Restricting group results - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - Nested functions - Character functions for string manipulation |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
Oracle Database 23ai SQL Associate Sample Questions:
Which of the following can be achieved using a correlated subquery?
- A. Inserting data into a table
- B. Joining two tables without a common column
- C. Comparing each employee's salary to the average salary of their department
- D. Retrieving duplicate records from a single table
Correct Answer: C 🗳️
What happens if a DELETE statement is executed without a WHERE clause?
- A. No rows are deleted.
- B. Only the first row is deleted.
- C. An error is raised.
- D. All rows in the table are deleted.
Correct Answer: D 🗳️
Which type of subquery returns exactly one value?
- A. Scalar subquery
- B. Inline view
- C. Correlated subquery
- D. Multiple-row subquery
Correct Answer: A 🗳️
How can a synonym benefit database design?
- A. It provides a consistent reference to database objects, even if their underlying names change.
- B. It improves query execution time.
- C. It allows the renaming of columns in a table.
- D. It enforces constraints on table columns.
Correct Answer: A 🗳️
What is the purpose of the DBA_OBJECTS data dictionary view?
- A. To show the current session details
- B. To list all users in the database
- C. To monitor system performance
- D. To provide information about all objects in the database
Correct Answer: D 🗳️
