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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - Data type conversion: implicit and explicit - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Date arithmetic and date functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - ROUND, TRUNC, MOD functions |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operator precedence rules - Sorting query results |
| DDL for Tables and Relationships | 15% | - Constraints management - TRUNCATE TABLE statement - Drop columns, set unused columns - CREATE TABLE statement - Views management - Temporary and external tables - Table structure, columns, data types |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
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NEW QUESTION # 99
Which INTERVAL data type would you use to store a period of time in years and months?
Answer: D
NEW QUESTION # 100
What is a subquery in SQL?
Answer: A
NEW QUESTION # 101
What is the primary purpose of a primary key in a relational database?
Answer: A
NEW QUESTION # 102
What is the default order of evaluation when multiple SET operators are used in a query?
Answer: A
NEW QUESTION # 103
Which of the following statements is true about constraints in Oracle Database?
Answer: A
NEW QUESTION # 104
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