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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Nested functions - Character functions for string manipulation - Restricting group results - Data type conversion: implicit and explicit - Date arithmetic and date functions - ROUND, TRUNC, MOD functions |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - CREATE TABLE statement - Drop columns, set unused columns - Constraints management - Temporary and external tables - Table structure, columns, data types - Views management |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Sorting query results - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Operator precedence rules - DEFINE and VERIFY commands |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
Oracle Database 23ai SQL Associate Sample Questions:
1. What does the EXISTS operator check in a subquery?
A) If the subquery returns a specific number of rows
B) If the subquery returns any rows
C) If the subquery references the outer query
D) If the subquery contains only unique values
2. What happens when a unique index is created on a table column?
A) The column can only contain NULL values.
B) The column values are automatically encrypted.
C) The column cannot contain duplicate values.
D) The column data type is converted to a primary key.
3. What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;
A) Decrease the salary of employees in department 10 by 10%
B) Set the salary to 1.1 for employees in department 10
C) Increase the salary of employees in department 10 by 10%
D) Increase the salary of all employees by 10%
4. What is the primary purpose of an index in SQL?
A) To store metadata about a table
B) To enforce data integrity constraints
C) To ensure uniqueness of values in a column
D) To improve the performance of data retrieval queries
5. What happens when a temporary table is created in Oracle Database?
A) It is created for the duration of a user session or transaction.
B) It cannot have any constraints.
C) It is permanently stored in the database.
D) It is stored in external files.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: C | Question # 3 Answer: C | Question # 4 Answer: D | Question # 5 Answer: A |
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