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Oracle Database SQL Sample Questions (Q144-Q149):

NEW QUESTION # 144
You want to write a query that prompts for two column names and the WHEREcondition each time it is executed in a session but only prompts for the table name the first time it is executed.
The variables used in your query are never undefined in your session.
Which query can be used?

  • A.
  • B.
  • C.
  • D.
  • E.

Answer: E


NEW QUESTION # 145
View the Exhibit and examine the description of the ORDERS table.

Which two WHERE clause conditions demonstrate the correct usage of conversion functions? (Choose two.)

  • A. WHERE TO_CHAR(order_date,'MON DD YYYY') = 'JAN 20 2003'
  • B. WHERE order_date > TO_CHAR(ADD_MONTHS(SYSDATE,6),'MON DD YYYY')
  • C. WHERE order_date_IN ( TO_DATE('OCT 21 2003','MON DD YYYY'), TO_CHAR('NOV 21
    2003','MON DD YYYY') )
  • D. WHERE order_date > TO_DATE('JUL 10 2006','MON DD YYYY')

Answer: A,D


NEW QUESTION # 146
The customers table has the following structure:

You need to write a query that does the following tasks:
1. Display the first name and tax amount of the customers. Tax is 5% of their credit limit.
2. Only those customers whose income level has a value should be considered.
3. Customers whose tax amount is null should not be considered.
Which statement accomplishes all the required tasks?

  • A. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level IS NOT NULL ANDtax_amount IS NOT NULL;
  • B. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE (cust_income_level, tax_amount) IS NOT NULL;
  • C. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level <> NULL ANDtax_amount <> NULL;
  • D. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level IS NOT NULL ANDcust_credit_limit IS NOT NULL;

Answer: D


NEW QUESTION # 147
Which three statements are true about GLOBAL TEMPORARY TABLES?

  • A. A GLOBAL TEMPORARY TABLE can have only one index.
  • B. Data Manipulation Language (DML) on GLOBAL TEMPORARY TABLES generates no REDO.
  • C. A trigger can be created on a GLOBAL TEMPORARY TABLE
  • D. A GLOBAL TEMPORARY TABLE cannot have PUBLIC SYNONYM.
  • E. A GLOBAL TEMPORARY TABLE can be referenced in the defining query of a view.
  • F. A GLOBAL TEMPORARY TABLE can have multiple indexes

Answer: C,E,F


NEW QUESTION # 148
View the exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.

You wrote this SQL statement to retrieve EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, for all employees:
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 table prefix is missing for the column names in the SELECT clause.
  • B. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
  • C. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.
  • D. The NATURAL JOIN clause is missing the USING clause.

Answer: C

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


NEW QUESTION # 149
......

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