1Z0-071 RELIABLE TEST VOUCHER & 1Z0-071 TESTKING

1z0-071 Reliable Test Voucher & 1z0-071 Testking

1z0-071 Reliable Test Voucher & 1z0-071 Testking

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Oracle Database SQL Sample Questions (Q120-Q125):

NEW QUESTION # 120
Which statement is true about an inner join specified in a query's WHERE clause?

  • A. It applies for equijoin and nonequijoin conditions.
  • B. It only applies for equijoin conditions.
  • C. It must have primary-key and foreign-key constraints defined on the join columns.
  • D. It requires column names to be the same in all tables being joined.

Answer: A


NEW QUESTION # 121
Which three are key components of an Entity Relationship Model? (Choose three.)

  • A. a table
  • B. an activity
  • C. an attribute
  • D. an entity
  • E. a relationship
  • F. a unique identifier

Answer: C,D,E

Explanation:
The three main components of the ER Model are entities, attributes and relationships.
Reference: https://www.dlsweb.rmit.edu.au/Toolbox/knowmang/content/data_concepts/e_r_model.htm


NEW QUESTION # 122
View the exhibit and examine the structure in ORDERSand ORDER_ITEMStables.

You need to create a view that displays the ORDER_ID, ORDER_DATE, and the total number of items in each order.
Which CREATEVIEWstatement would create the views successfully?

  • A. CREATE OR REPLACE VIEW ord_vu
    AS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)
    FROM orders o JOIN order_items i
    ON (o.order_id = i.order_id)
    GROUP BY o.order_id, o.order_date;
  • B. CREATE OR REPLACE VIEW ord_vu
    AS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)
    " NO OF ITEMS"
    FROM orders o JOIN order_items i
    ON (o.order_id = i.order_id)
    GROUP BY o.order_id, o.order_date;
  • C. CREATE OR REPLACE VIEW ord_vu
    AS SELECT o.order_id, o.order_date, COUNT (i.line_item_id) ||
    " NO OF ITEMS"
    FROM orders o JOIN order_items i
    ON (o.order_id = i.order_id)
    GROUP BY o.order_id, o.order_date
    WHITH CHECK OPTION;
  • D. CREATE OR REPLACE VIEW ord_vu (order_id, order_date)
    AS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)
    " NO OF ITEMS"
    FROM orders o JOIN order_items i
    ON (o.order_id = i.order_id)
    GROUP BY o.order_id, o.order_date;

Answer: B


NEW QUESTION # 123
Which statement is true about aggregate functions?

  • A. Aggregate functions can be nested to any number of levels
  • B. Aggregate functions can be used in any clause of a SELECT statement
  • C. The AVG function implicitly converts NULLS to zero
  • D. The MAX and MIN functions can be used on columns with character data types

Answer: D

Explanation:
B: True. The MAX and MIN functions can be applied to columns with character data types. These functions will return the highest or lowest values in a set of rows, based on alphabetical order for character data. This allows these aggregate functions to be versatile and useful across different data types, including numerical, date, and character types.


NEW QUESTION # 124
Examine the description of the ENPLOYES table:

Which query requires explicit data type conversion?

  • A. SELECT salary + '120.50' FROM employees;
  • B. SELECT join _ date FROM employees WHERE join date > *10-02-2018';
  • C. SELECT join_ date'' salary FROM employees;
  • D. SELECT join_ date + '20' EROM employees;
  • E. SELECT SUBSTR(join date, 1, 2) - 10 FROM employees;

Answer: B


NEW QUESTION # 125
......

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