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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 2: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 3: DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Views management - Constraints management - CREATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - Temporary and external tables |
| Topic 4: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 5: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 6: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Sorting query results - Operator precedence rules |
| Topic 7: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 8: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 9: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 10: Using Functions | 25% | - ROUND, TRUNC, MOD functions - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - Nested functions - Restricting group results - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Date arithmetic and date functions |
| Topic 11: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
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NEW QUESTION # 62
What is the default order of evaluation when multiple SET operators are used in a query?
Answer: C
NEW QUESTION # 63
Which SQL function calculates the number of months between two dates?
Response:
Answer: B
NEW QUESTION # 64
Which type of join includes rows that do not have matching values in the joined table?
Answer: A
NEW QUESTION # 65
Which of the following SET operators combines results from two queries and removes duplicates?
Answer: A
NEW QUESTION # 66
Which clause in a SQL SELECT statement is used to define the columns to be retrieved?
Answer: C
NEW QUESTION # 67
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