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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Views management - TRUNCATE TABLE statement - Drop columns, set unused columns - Temporary and external tables - Constraints management - Table structure, columns, data types |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Using Functions | 25% | - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Date arithmetic and date functions - Nested 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 |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Sorting query results - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - DEFINE and VERIFY commands |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
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NEW QUESTION # 100
What is the difference between UNION and UNION ALL?
Answer: D
NEW QUESTION # 101
Which SQL function converts a string representation of a date into a date data type?
Answer: B
NEW QUESTION # 102
What is the primary purpose of an index in SQL?
Answer: A
NEW QUESTION # 103
What is the purpose of the MERGE statement in SQL?
Answer: D
NEW QUESTION # 104
What does the NEXTVAL pseudocolumn do in SQL?
Answer: C
NEW QUESTION # 105
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