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| Section | Weight | Objectives |
|---|---|---|
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| DDL for Tables and Relationships | 15% | - Table structure, columns, data types - CREATE TABLE statement - Constraints management - Views management - TRUNCATE TABLE statement - Temporary and external tables - Drop columns, set unused columns |
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions - Restricting group results - Data type conversion: implicit and explicit - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Character functions for string manipulation |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operator precedence rules - Operators, literals, DISTINCT keyword - Sorting query results - Limiting rows and substitution variables |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
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NEW QUESTION # 14
What is the purpose of the MERGE statement in SQL?
Answer: B
NEW QUESTION # 15
Which type of INSERT statement allows inserting rows into multiple tables using a single SELECT query?
Answer: B
NEW QUESTION # 16
What is the primary purpose of granting privileges in Oracle Database?
Answer: B
NEW QUESTION # 17
Which SQL function converts a string representation of a date into a date data type?
Answer: A
NEW QUESTION # 18
Which function is used to extract the year from a date in SQL?
Answer: B
NEW QUESTION # 19
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