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| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - Temporary and external tables - TRUNCATE TABLE statement - Views management - Drop columns, set unused columns - Table structure, columns, data types - Constraints management - CREATE TABLE statement |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Using Functions | 25% | - Nested functions - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - Date arithmetic and date functions |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Sorting query results - Operator precedence rules - Arithmetic expressions and NULL values |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
>> 1Z1-171 Valid Test Questions <<
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NEW QUESTION # 25
Which SQL function converts a string representation of a date into a date data type?
Answer: A
NEW QUESTION # 26
Which of the following SET operators combines results from two queries and removes duplicates?
Answer: A
NEW QUESTION # 27
Which data dictionary view lists all indexes created by the current user?
Answer: C
NEW QUESTION # 28
Which SQLPlus command displays defined substitution variable values?
Answer: B
NEW QUESTION # 29
What happens when the maximum value of a sequence is reached?
Answer: C
NEW QUESTION # 30
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