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| Section | Weight | Objectives |
|---|---|---|
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Operator precedence rules - DEFINE and VERIFY commands - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Sorting query results |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Drop columns, set unused columns - Table structure, columns, data types - TRUNCATE TABLE statement - Temporary and external tables - Views management - Constraints management |
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Using Functions | 25% | - Date arithmetic and date functions - Nested functions - Data type conversion: implicit and explicit - Restricting group results - Character functions for string manipulation - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data |
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NEW QUESTION # 33
Which type of subquery returns exactly one value?
Answer: A
NEW QUESTION # 34
What does a Cartesian product in SQL result from?
Answer: B
NEW QUESTION # 35
What is the difference between UNION and UNION ALL?
Answer: D
NEW QUESTION # 36
What is the output of the following query?
SELECT CURRENT_DATE FROM dual;
Answer: C
NEW QUESTION # 37
Which SQL function converts a string representation of a date into a date data type?
Answer: D
NEW QUESTION # 38
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