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| Section | Weight | Objectives |
|---|---|---|
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Drop columns, set unused columns - Views management - Constraints management - Temporary and external tables - CREATE TABLE statement - TRUNCATE TABLE statement |
| Using Functions | 25% | - Group functions and grouping data - Nested functions - Data type conversion: implicit and explicit - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Restricting group results - Date arithmetic and date functions |
| Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operator precedence rules - Arithmetic expressions and NULL values - Sorting query results - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands |
The contents of 1Z1-171 learning questions are carefully compiled by the experts according to the content of the 1Z1-171 examination syllabus of the calendar year. They are focused and detailed, allowing your energy to be used in important points of knowledge and to review them efficiently. In addition, 1Z1-171 Guide engine is supplemented by a mock examination system with a time-taking function to allow users to check the gaps in the course of learning.
NEW QUESTION # 94
Which command would drop an index from a table?
Answer: D
NEW QUESTION # 95
What happens when the TRUNCATE TABLE statement is executed?
Answer: A
NEW QUESTION # 96
What is a role in Oracle Database?
Answer: A
NEW QUESTION # 97
What happens when the maximum value of a sequence is reached?
Answer: C
NEW QUESTION # 98
Which clause in a SQL SELECT statement is used to define the columns to be retrieved?
Answer: D
NEW QUESTION # 99
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