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Oracle Database SQL Sample Questions (Q227-Q232):

NEW QUESTION # 227
Examine the description of the EMPLOYEES table:

Which statement increases each employee's SALARY by the minimum SALARY for their DEPARTM ENT_ID?

A. UPDATE employees e1
SET salary=
(SELECT e1.salary + MIN(e2.salary)
FROM employees e2
WHERE e1. department_ id = e2.department_id);
B. UPDATE employees e1
SET salary =(SELECT e2. salary + MIN(e2.salary)
FROM employees e2
WHERE e1.department_ id = e2. department_id GROUP BY e2. department_id) ;
C. UPDATE employees e1
SET salary = salary +
(SELECT MIN(e1. salary)
FROM employees e2
WHERE e1.department_id = e2 .department_id);
D. UPDATE employees e1
SET salary = salary+(SELECT MIN (salary)
FROM employees e2) ;

Answer: A

NEW QUESTION # 228
View the exhibit and examine the description of the DEPARTMENTSand EMPLOYEEStables.

The retrieve data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following SQL statement was written:
SELECT employee_id, first_name, department_name
FROM employees
NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?

A. The EMPLOYEESand DEPARTMENTStables have more than one column with the same column name and data type.
B. The table prefix is missing for the column names in the SELECTclause.
C. The DEPARTMENTStable is not used before the EMPLOYEEStable in the FROMclause.
D. The NATURAL JOINclause is missing the USINGclause.

Answer: A

Explanation:
Explanation/Reference:
Explanation:
Natural join needs only one column to be the same in each table. The EMPLOYEESand DEPARTMENTS tables have two columns that are the same (Department_ID and Manager_ID)

NEW QUESTION # 229
View the exhibit and examine the structure of the SALES, CUSTOMERS, PRODUCTS and TIMES tables.

The PROD_ID column is the foreign key in the SALES table referencing the PRODUCTS table.
The CUST_ID and TIME_ID columns are also foreign keys in the SALES table referencing the CUSTOMERS and TIMES tables, respectively.
Examine this command:
CREATE TABLE new_sales (prod_id, cust_id, order_date DEFAULT SYSDATE)
AS
SELECT prod_id, cust_id, time_id
FROM sales;
Which statement is true?

A. The NEW_SALES table would not get created because the DEFAULT value cannot be specified in the column definition.
B. The NEW_SALES table would get created and all the FOREIGN KEY constraints defined on the selected columns from the SALES table would be created on the corresponding columns in the NEW_SALES table.
C. The NEW_SALES table would not get created because the column names in the CREATE TABLE command and the SELECT clause do not match.
D. The NEW_SALES table would get created and all the NOT NULL constraints defined on the selected columns from the SALES table would be created on the corresponding columns in the NEW_SALES table.

Answer: D

NEW QUESTION # 230
Which three items does a direction of a relationship contain?

A. an entity
B. a unique identifier
C. an attribute
D. a cardinality
E. an optionality
F. label

Answer: A,C,D

NEW QUESTION # 231
Examine the description of the CUSTOMERStable:

You want to display details of all customers who reside in cities starting with the letter D followed by at least two characters.
Which query can be used?
SELECT * FROM customers WHERE city = 'D_%';

A.
B. SELECT * FROM customers WHERE city LIKE 'D_';
C. SELECT * FROM customers WHERE city = '%D_';
D. SELECT * FROM customers WHERE city LIKE 'D_%';

Answer: C

NEW QUESTION # 232
......

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