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| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Temporary and external tables - Drop columns, set unused columns - Views management - Constraints management - TRUNCATE TABLE statement - CREATE TABLE statement |
| Using Functions | 25% | - Group functions and grouping data - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Restricting group results - Nested functions - Character functions for string manipulation - Date arithmetic and date functions |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Sorting query results - Limiting rows and substitution variables |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
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NEW QUESTION # 52
How can a synonym benefit database design?
Answer: A
NEW QUESTION # 53
Which statement can be used to undo changes made in a transaction?
Answer: A
NEW QUESTION # 54
What is the purpose of a correlated subquery?
Answer: B
NEW QUESTION # 55
Which clause is used to ensure that only specific rows are deleted in a DELETE statement?
Answer: A
NEW QUESTION # 56
Which data dictionary view provides information about all tables accessible to the current user?
Answer: D
NEW QUESTION # 57
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