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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - Constraints management - Temporary and external tables - Table structure, columns, data types - Views management - Drop columns, set unused columns - CREATE TABLE statement - TRUNCATE TABLE statement |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operator precedence rules - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Sorting query results - DEFINE and VERIFY commands |
| Using Functions | 25% | - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - ROUND, TRUNC, MOD functions - Restricting group results - Data type conversion: implicit and explicit - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
Oracle Database 23ai SQL Associate Sample Questions:
Question 1
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
Question 2
Which type of join returns all rows from the left table, even if there are no matches in the right table?
A. FULL OUTER JOIN
B. RIGHT OUTER JOIN
C. LEFT OUTER JOIN
D. INNER JOIN
Question 3
Which SQL function calculates the number of months between two dates?
Response:
A. DATE_CALC
B. DATE_DIFF
C. MONTHS_BETWEEN
D. TIME_DIFF
Question 4
How are NULL values treated in relational databases?
A. NULL values represent missing or unknown data.
B. NULL values are treated as zero.
C. NULL values are not allowed in relational databases.
D. NULL values are treated as empty strings.
Question 5
Which type of privilege allows a user to perform administrative tasks, such as creating other users?
A. Schema privilege
B. System privilege
C. Table privilege
D. Object privilege
Solutions:
| Question 1 Answer: D | Question 2 Answer: C | Question 3 Answer: C | Question 4 Answer: A | Question 5 Answer: B |
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