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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| 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 |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| 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 |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| 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 |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
Oracle Database 23ai SQL Associate Sample Questions:
1. 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
2. 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.
3. Which type of subquery returns exactly one value?
A) Scalar subquery
B) Inline view
C) Correlated subquery
D) Multiple-row subquery
4. 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.
5. 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
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: D | Question # 3 Answer: A | Question # 4 Answer: A | Question # 5 Answer: D |
