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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving Data Using SQL SELECT Statement | 20% | - SELECT statement syntax and usage - Arithmetic operations and NULL handling - Column aliases, concatenation, literals and DISTINCT |
| Topic 2: Restricting and Sorting Data | 15% | - WHERE clause and filtering conditions - Operator precedence - ORDER BY clause and sorting rules - Substitution variables, DEFINE and VERIFY commands |
| Topic 3: Conversion Functions and Conditional Expressions | 10% | - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions - NVL, NULLIF, COALESCE and CASE expressions |
| Topic 4: Aggregating Data Using Group Functions | 10% | - Handling NULLs in group functions - GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions |
| Topic 5: Using SET Operators | - UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations | |
| Topic 6: Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Topic 7: Managing Indexes, Synonyms and Sequences | - Create and maintain indexes - Create and use sequences - Create and use synonyms | |
| Topic 8: Relational Database Concepts | 10% | - ERD and SQL statement mapping - Relationship between database and SQL - Theoretical and physical aspects of relational databases |
| Topic 9: Using Single-Row Functions to Customize Output | 20% | - Nested functions usage - Character, number, and date functions |
| Topic 10: Manipulating Data and Managing Transactions | - Multi-table inserts - INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT | |
| Topic 11: Managing Views | - Create, modify and drop views - Updatable and read-only views | |
| Topic 12: Displaying Data from Multiple Tables | 15% | - Self-joins and outer joins - Cartesian products - Equijoins and non-equijoins |
| Topic 13: Managing Tables and Constraints | - Temporary and external tables - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null | |
| Topic 14: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 15: Using Subqueries to Solve Queries | - Correlated subqueries for update/delete - Single-row and multi-row subqueries | |
| Topic 16: Working with Time Zones and Date/Time Data | - Time zone conversion functions - TIMESTAMP, INTERVAL data types |
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NEW QUESTION # 365
View the Exhibit and examine the structure of the PRODUCT_INFORMATIONand INVENTORIEStables.
You have a requirement from the supplies department to give a list containing PRODUCT_ID, SUPPLIER_ID, and QUANTITY_ON_HANDfor all the products wherein QUANTITY_ON_HANDis less than five.
Which two SQL statements can accomplish the task? (Choose two.)
SELECT i.product_id, i.quantity_on_hand, pi.supplier_id
Answer: A,C
NEW QUESTION # 366
Examine the contents of the EMP table:
Examine this query that executes successfully:
What is the result?
Answer: B
Explanation:
CREATE TABLE EMP
(
ID NUMBER(10),
NAME VARCHAR2(10),
SALARY NUMBER(10)
)
INSERT INTO EMP VALUES (101, 'JOHN', 26000);
INSERT INTO EMP VALUES (102, 'NEENA', 24000);
INSERT INTO EMP VALUES (103, 'DEHAAN', 12000);
INSERT INTO EMP VALUES (104, 'LEX', 17000);
INSERT INTO EMP VALUES (105, 'BILL', 18000);
INSERT INTO EMP VALUES (106, 'DANIEL', 26000);
INSERT INTO EMP VALUES (107, 'BEN', 12000);
INSERT INTO EMP VALUES (108, 'GEORGE', 25000);
SELECT * FROM EMP
ORDER BY SALARY
FETCH FIRST 5 ROWS WITH TIES;
NEW QUESTION # 367
You issued this command:
CHOOSE THREE
SQL > DROP TABLE employees;
Which three statements are true?
Answer: A,D,E
NEW QUESTION # 368
View the exhibit and examine the description of the EMPLOYEES table. (Choose two.)
You executed this SQL statement:
SELECT first_name, department_id, salary
FROM employees
ORDER BY department_id, first_name, salary desc;
Which two statements are true regarding the result? (Choose two.)
Answer: C,D
NEW QUESTION # 369
Which three statements are true about time zones, date data types, and timestamp data types in an Oracle database?
Answer: A,B,D
Explanation:
A: True. The DBTIMEZONE function returns the database's time zone offset from UTC (Coordinated Universal Time). In Oracle 12c, DBTIMEZONE can return the time zone of the database in terms of a region name or as a numeric offset from UTC. This is stated in the Oracle documentation for managing time zones.
B: True. TIMESTAMP WITH LOCAL TIME ZONE is a data type that adjusts the data stored in the database to the time zone of the session that is querying or inserting the data. When data is stored, Oracle converts it from the session time zone to UTC, and upon retrieval, it converts it back to the session time zone.
This is a feature designed to allow the same data to be viewed in different time zones automatically, making it highly useful in global applications.
D: True. SESSIONTIMEZONE function returns the time zone offset of the current session from UTC. This is useful for understanding and managing data conversions in applications that are used across different time zones. The time zone can be displayed as an offset from UTC or as a named region depending on the environment settings.
NEW QUESTION # 370
......
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