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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Sorting query results - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Operator precedence rules |
| Using Functions | 25% | - Date arithmetic and date functions - Group functions and grouping data - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - Restricting group results - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| DDL for Tables and Relationships | 15% | - Views management - Temporary and external tables - Drop columns, set unused columns - Table structure, columns, data types - Constraints management - CREATE TABLE statement - TRUNCATE TABLE statement |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
Oracle Database 23ai SQL Associate Sample Questions:
Question 1
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
A. Delete all rows in the employees table
B. Delete all rows where department_id is 20
C. Delete the department_id column in the employees table
D. Raise an error because DELETE cannot use a WHERE clause
Question 2
What happens if a privilege is revoked from a user who has granted the same privilege to others?
A. The privilege is transferred to another user.
B. The privilege cannot be revoked in this scenario.
C. The privilege is retained by the other users.
D. The privilege is revoked from all other users.
Question 3
Which type of join retrieves only the rows with matching values in both tables?
A. INNER JOIN
B. CROSS JOIN
C. NATURAL JOIN
D. OUTER JOIN
Question 4
The column data type is converted to a primary key.
A. CREATE SYNONYM
B. CREATE ALIAS
C. CREATE SEQUENCE
D. CREATE INDEX
Question 5
Which of the following data dictionary views provides information about constraints on tables?
A. All of the above
B. DBA_CONSTRAINTS
C. USER_CONSTRAINTS
D. ALL_CONSTRAINTS
Solutions:
| Question 1 Answer: B | Question 2 Answer: D | Question 3 Answer: A | Question 4 Answer: A | Question 5 Answer: A |
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