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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Operator precedence rules - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Limiting rows and substitution variables - Sorting query results |
| Topic 2: Using Functions | 25% | - Group functions and grouping data - Data type conversion: implicit and explicit - Nested functions - Character functions for string manipulation - Date arithmetic and date functions - Restricting group results - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Topic 3: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 4: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 5: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 6: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Topic 7: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 8: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - CREATE TABLE statement - TRUNCATE TABLE statement - Views management - Temporary and external tables - Constraints management - Drop columns, set unused columns |
| Topic 9: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Topic 10: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 11: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
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NEW QUESTION # 47
Which of the following is a valid reason to create a synonym?
Answer: D
NEW QUESTION # 48
What happens if a DELETE statement is executed without a WHERE clause?
Answer: C
NEW QUESTION # 49
How can you ensure that data is sorted in descending order in a SQL query?
Answer: C
NEW QUESTION # 50
How does SQL handle NULL values in arithmetic expressions?
Answer: C
NEW QUESTION # 51
Which of the following SET operators combines results from two queries and removes duplicates?
Answer: B
NEW QUESTION # 52
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