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| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| DDL for Tables and Relationships | 15% | - Views management - Temporary and external tables - Table structure, columns, data types - Constraints management - TRUNCATE TABLE statement - Drop columns, set unused columns - CREATE TABLE statement |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Using Functions | 25% | - Character functions for string manipulation - ROUND, TRUNC, MOD functions - Restricting group results - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - Data type conversion: implicit and explicit - Group functions and grouping data |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Sorting query results - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
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NEW QUESTION # 30
What happens when the maximum value of a sequence is reached?
Answer: A
NEW QUESTION # 31
Which SET operator returns rows from the first query that are not present in the second query?
Answer: B
NEW QUESTION # 32
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: C
NEW QUESTION # 33
Which command is used to add a new column to an existing table?
Answer: D
NEW QUESTION # 34
Which type of subquery returns exactly one value?
Answer: C
NEW QUESTION # 35
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