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| Section | Weight | Objectives |
|---|---|---|
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Retrieving and Sorting Data | 15% | - Sorting query results - Limiting rows and substitution variables - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operator precedence rules |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Using Functions | 25% | - Character functions for string manipulation - Group functions and grouping data - Data type conversion: implicit and explicit - Restricting group results - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Constraints management - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - Temporary and external tables - Views management |
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NEW QUESTION # 55
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
Answer: B
NEW QUESTION # 56
What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
Answer: D
NEW QUESTION # 57
Which command grants a user the ability to query data from a specific table?
Answer: C
NEW QUESTION # 58
What is the default order of evaluation when multiple SET operators are used in a query?
Answer: C
NEW QUESTION # 59
Which SQL function converts a string representation of a date into a date data type?
Answer: D
NEW QUESTION # 60
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