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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 2: Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Date arithmetic and date functions - Restricting group results - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - Character functions for string manipulation |
| Topic 3: Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 4: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 5: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 6: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 7: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 8: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Topic 9: Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Sorting query results - Operator precedence rules - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Limiting rows and substitution variables - DEFINE and VERIFY commands |
| Topic 10: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - TRUNCATE TABLE statement - CREATE TABLE statement - Temporary and external tables - Table structure, columns, data types - Views management - Constraints management |
| Topic 11: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
1. What does a Cartesian product in SQL result from?
A) A NATURAL JOIN without specifying join conditions
B) An INNER JOIN without specifying join conditions
C) An OUTER JOIN with NULL values
2. What happens when a unique index is created on a table column?
A) The column can only contain NULL values.
B) The column cannot contain duplicate values.
C) The column values are automatically encrypted.
D) The column data type is converted to a primary key.
3. What happens when the TRUNCATE TABLE statement is executed?
A) Deletes all rows in the table without logging the operation for rollback
B) Deletes the table structure permanently
C) Deletes all rows in the table and logs the operation for rollback
D) Deletes only the last row in the table
4. What is a subquery in SQL?
A) A query that combines data from multiple tables
B) A query used to create a table
C) A query inside another query
D) A query used for joining two or more tables
5. Which data dictionary view lists all indexes created by the current user?
A) USER_INDEXES
B) ALL_INDEXES
C) INDEX_LIST
D) DBA_INDEXES
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: B | Question # 3 Answer: A | Question # 4 Answer: C | Question # 5 Answer: A |
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