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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Sorting query results - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Limiting rows and substitution variables - Using SELECT statement and column aliases - Arithmetic expressions and NULL values |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Using Functions | 25% | - Restricting group results - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Group functions and grouping data - Character functions for string manipulation - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions |
| DDL for Tables and Relationships | 15% | - Constraints management - TRUNCATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - Views management - CREATE TABLE statement - Temporary and external tables |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
Oracle Database 23ai SQL Associate Sample Questions:
Question #1
What does a Cartesian product in SQL result from?
A. An OUTER JOIN with NULL values
B. An INNER JOIN without specifying join conditions
C. A NATURAL JOIN without specifying join conditions
Question #2
Which SQL clause can be used in Oracle to limit the number of rows returned?
A. WHERE
B. FETCH FIRST n ROWS ONLY
C. DISTINCT
D. GROUP BY
Question #3
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
A. Raise an error because DELETE cannot use a WHERE clause
B. Delete all rows in the employees table
C. Delete the department_id column in the employees table
D. Delete all rows where department_id is 20
Question #4
Which Oracle SQL function returns the current date and time, including time zone information?
A. CURRENT_DATE
B. CURRENT_TIMESTAMP
C. NOW
D. SYSDATE
Question #5
Which command is used to add a new column to an existing table?
A. ADD COLUMN
B. MODIFY COLUMN
C. ALTER TABLE
D. ALTER COLUMN
Solutions:
| Question #1 Correct Answer: B | Question #2 Correct Answer: B | Question #3 Correct Answer: D | Question #4 Correct Answer: B | Question #5 Correct Answer: C |
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