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| Section | Weight | Objectives |
|---|---|---|
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Operator precedence rules - Limiting rows and substitution variables - Sorting query results - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - DEFINE and VERIFY commands |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| 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 - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Using Functions | 25% | - Character functions for string manipulation - ROUND, TRUNC, MOD functions - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Nested functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit |
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Temporary and external tables - Constraints management - Views management - Drop columns, set unused columns - CREATE TABLE statement - Table structure, columns, data types |
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NEW QUESTION # 48
Which SQL function converts a string representation of a date into a date data type?
Answer: B
NEW QUESTION # 49
Which data dictionary view provides information about all tables accessible to the current user?
Answer: C
NEW QUESTION # 50
How does SQL handle NULL values in arithmetic expressions?
Answer: D
NEW QUESTION # 51
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
Answer: B
NEW QUESTION # 52
What is the relationship between SQL and a relational database?
Answer: D
NEW QUESTION # 53
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