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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operator precedence rules - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Drop columns, set unused columns - Table structure, columns, data types - Constraints management - Temporary and external tables - Views management - TRUNCATE TABLE statement |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Using Functions | 25% | - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - Restricting group results - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Character functions for string manipulation - Date arithmetic and date functions - ROUND, TRUNC, MOD functions |
Oracle Database 23ai SQL Associate Sample Questions:
Question 1
What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
A. A syntax error
B. Concatenated first and last names without spaces
C. Concatenated first and last names with spaces in between
D. Only the first names of employees
Question 2
What is a sequence in Oracle Database?
A. A list of numbers stored in a table
B. A database object that generates a series of unique numeric values
C. A predefined set of SQL queries executed in order
D. A type of index used for sorting rows
Question 3
What is the result of using the following SQL query?
SELECT 100 + NULL AS result;
A. 0
B. NULL
C. 100
D. An error
Question 4
Which of the following ensures that a relational database enforces data integrity?
A. Hierarchical data organization
B. Redundant data storage
C. Constraints such as primary keys, foreign keys, and unique constraints
D. Indexes on all columns
Question 5
How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
A. LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
B. LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.
C. LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
D. Both functions are identical in output.
Solutions:
| Question 1 Answer: C | Question 2 Answer: B | Question 3 Answer: B | Question 4 Answer: C | Question 5 Answer: A |
