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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Using Functions | 25% | - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Nested functions - Character functions for string manipulation |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Constraints management - Temporary and external tables - Table structure, columns, data types - CREATE TABLE statement - Drop columns, set unused columns - Views management |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| 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 synonyms - Create and manage indexes |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Arithmetic expressions and NULL values - Operator precedence rules |
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NEW QUESTION # 86
What is a sequence in Oracle Database?
Answer: C
NEW QUESTION # 87
What is the purpose of the DBA_OBJECTS data dictionary view?
Answer: C
NEW QUESTION # 88
What happens when a temporary table is created in Oracle Database?
Answer: D
NEW QUESTION # 89
What happens when a unique index is created on a table column?
Answer: B
NEW QUESTION # 90
What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;
Answer: B
NEW QUESTION # 91
......
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