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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - Date arithmetic and date functions - Data type conversion: implicit and explicit - Restricting group results - Group functions and grouping data - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Nested functions |
| DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Constraints management - Table structure, columns, data types - Temporary and external tables - CREATE TABLE statement - TRUNCATE TABLE statement - Views management |
| Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Retrieving and Sorting Data | 15% | - Sorting query results - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Operator precedence rules - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Limiting rows and substitution variables |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
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NEW QUESTION # 54
What is required for the queries combined by a SET operator to work correctly?
Answer: A
NEW QUESTION # 55
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: C
NEW QUESTION # 56
What is the output of the following query?
SELECT CURRENT_DATE FROM dual;
Answer: D
NEW QUESTION # 57
What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;
Answer: D
NEW QUESTION # 58
How can a synonym benefit database design?
Answer: D
NEW QUESTION # 59
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