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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Restricting group results - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Nested functions - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Date arithmetic and date functions |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Sorting query results - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Operator precedence rules - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| 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 |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - TRUNCATE TABLE statement - Views management - Table structure, columns, data types - Temporary and external tables - Drop columns, set unused columns - Constraints management |
Oracle Database 23ai SQL Associate Sample Questions:
1. Which SQL function calculates the number of months between two dates?
Response:
A) TIME_DIFF
B) DATE_CALC
C) MONTHS_BETWEEN
D) DATE_DIFF
2. How are NULL values treated in relational databases?
A) NULL values represent missing or unknown data.
B) NULL values are not allowed in relational databases.
C) NULL values are treated as zero.
D) NULL values are treated as empty strings.
3. Which function returns the current system date and time in the database session's time zone?
A) LOCAL_TIME
B) SYSDATE
C) SYSTEM_TIME
D) CURRENT_TIMESTAMP
4. What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;
A) 100
B) NULL
C) 300
D) 200
5. Which of the following is an example of an object privilege?
A) ALTER USER
B) DROP DATABASE
C) CREATE TABLE
D) SELECT ON table_name
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: D |
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