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| Section | Weight | Objectives |
|---|---|---|
| Managing Indexes, Synonyms and Sequences | - Create and use sequences - Create and maintain indexes - Create and use synonyms | |
| Aggregating Data Using Group Functions | 10% | - GROUP BY and HAVING clauses - Handling NULLs in group functions - SUM, AVG, COUNT, MAX, MIN functions |
| Relational Database Concepts | 10% | - ERD and SQL statement mapping - Relationship between database and SQL - Theoretical and physical aspects of relational databases |
| Managing Views | - Create, modify and drop views - Updatable and read-only views | |
| Restricting and Sorting Data | 15% | - WHERE clause and filtering conditions - ORDER BY clause and sorting rules - Operator precedence - Substitution variables, DEFINE and VERIFY commands |
| Displaying Data from Multiple Tables | 15% | - Equijoins and non-equijoins - Self-joins and outer joins - Cartesian products |
| Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Controlling User Access | - System and object privileges - Roles, granting and revoking privileges | |
| Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Managing Tables and Constraints | - Constraints: primary key, foreign key, unique, check, not null - Temporary and external tables - Data types, creating/altering/dropping tables | |
| Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Conversion Functions and Conditional Expressions | 10% | - TO_CHAR, TO_NUMBER, TO_DATE functions - NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion |
| Retrieving Data Using SQL SELECT Statement | 20% | - Arithmetic operations and NULL handling - SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT |
| Manipulating Data and Managing Transactions | - Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - INSERT, UPDATE, DELETE, MERGE statements | |
| Using SET Operators | - UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations | |
| Using Data Dictionary Views | - Retrieve metadata and object information |
>> Simulation 1z0-071 Questions <<
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NEW QUESTION # 414
Evaluate the following CREATE TABLE command:
Which statement is true regarding the above SQL statement?
Answer: B
NEW QUESTION # 415
View the Exhibit and examine the structure of the EMP table which is not partitioned and not an index-organized table. (Choose two.)
Evaluate this SQL statement:
ALTER TABLE emp
DROP COLUMN first_name;
Which two statements are true?
Answer: B
NEW QUESTION # 416
Examine the structure of the two tables.
Which two queries execute successfully? (Choose two.)
Answer: B,E
NEW QUESTION # 417
Evaluate the following SELECTstatement and view the exhibit to examine its output:
SELECT constraint_name, constraint_type, search_condition, r_constraint_name, delete_rule, status, FROM user_constraints WHERE table_name = 'ORDERS';
Which two statements are true about the output? (Choose two.)
Answer: A,B
NEW QUESTION # 418
Examine the command:
SQL> ALTER TABLE books_transactions
ADD CONSTRAINT fk_book_id FOREIGN KEY (book_id)
REFERENCES books (book_id) ON DELETE CASCADE;
What does ON DELETE CASCADE imply?
Answer: B
NEW QUESTION # 419
......
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