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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Conversion Functions and Conditional Expressions | 10% | - NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions |
| Topic 2: Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Topic 3: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 4: Retrieving Data Using SQL SELECT Statement | 20% | - Column aliases, concatenation, literals and DISTINCT - SELECT statement syntax and usage - Arithmetic operations and NULL handling |
| Topic 5: Using SET Operators | - Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators | |
| Topic 6: Managing Indexes, Synonyms and Sequences | - Create and use synonyms - Create and maintain indexes - Create and use sequences | |
| Topic 7: Aggregating Data Using Group Functions | 10% | - GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions - Handling NULLs in group functions |
| Topic 8: Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Topic 9: Displaying Data from Multiple Tables | 15% | - Self-joins and outer joins - Cartesian products - Equijoins and non-equijoins |
| Topic 10: Using Single-Row Functions to Customize Output | 20% | - Character, number, and date functions - Nested functions usage |
| Topic 11: Controlling User Access | - System and object privileges - Roles, granting and revoking privileges | |
| Topic 12: Relational Database Concepts | 10% | - Theoretical and physical aspects of relational databases - Relationship between database and SQL - ERD and SQL statement mapping |
| Topic 13: Restricting and Sorting Data | 15% | - Operator precedence - Substitution variables, DEFINE and VERIFY commands - WHERE clause and filtering conditions - ORDER BY clause and sorting rules |
| Topic 14: Managing Views | - Create, modify and drop views - Updatable and read-only views | |
| Topic 15: Manipulating Data and Managing Transactions | - Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - INSERT, UPDATE, DELETE, MERGE statements | |
| Topic 16: Managing Tables and Constraints | - Data types, creating/altering/dropping tables - Temporary and external tables - Constraints: primary key, foreign key, unique, check, not null |
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NEW QUESTION # 126
Which three statements are true regarding the SQL WHERE and HAVING clauses?
Answer: C,D,E
NEW QUESTION # 127
In which three situations does a new transaction always start?
Answer: B,C,D
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14220/transact.htm
NEW QUESTION # 128
Evaluate the following ALTER TABLEstatement:
ALTER TABLE orders
SET UNUSED (order_date);
Which statement is true?
Answer: D
NEW QUESTION # 129
Which three statements about roles are true?
Answer: C,D,G
Explanation:
Roles are named collections of privileges in Oracle databases.
A). False. Roles cannot be assigned to other roles using the ALTER ROLE statement.
B). False. Roles can be assigned to both users and other roles.
C). True. Roles are assigned to users using the ALTER USER statement, but this is not the only method.
D). True. A single role can be assigned to multiple users, simplifying the management of user privileges.
E). True. A single user can be assigned multiple roles.
F). False. Privileges are not assigned to a role using the ALTER ROLE statement.
G). True. Privileges are assigned to a role using the GRANT statement.
NEW QUESTION # 130
Which two actions can you perform with object privileges? (Choose two.)
Answer: A,E
Explanation:
http://www.cruzroja.es/help/wvtdbobp.htm
NEW QUESTION # 131
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