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Question ID 1487

Click on the EXHIBIT button and examine the table instance chart for the sales table.
You attempt to change the database with this command: INSERT INTO sales (purchase_no, customer_id, car_id) VALUES (1234, 345, 6);
If this statement fails, which condition would explain the failure?
 

Option A

A.    The sales table has too many foreign keys.
 

Option B

B.    The statement has invalid datatypes.
 

Option C

C.    A mandatory column value is missing.

 

Option D

D.    This statement does not fail at all.

Correct Answer C
Explanation


Question ID 1488

Which statement about SQL is true?

Option A

A.    Date values are displayed in descending order by default.


 

Option B

B.    Null values are displayed last in ascending sequences.
 

Option C

C.    The results are sorted by the first column in the SELECT list if the ORDER BY clause is not provided.
 

Option D

D.    You cannot specify a column alias in an ORDER BY clause.

Correct Answer B
Explanation

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