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Chizue Mizokuchi

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Which of the following is the correct example of creating a subquery that copy the values from employees table to workers table?
Select one:
a.INSERT INTO WORKERS(ID, NAME, POSITION)
SELECT (ID, NAME, POSITION
FROM EMPLOYEES);
b.INSERT INTO WORKERS(ID, NAME, POSITION)
SELECT (ID, NAME, JOB_TITLE
FROM EMPLOYEES);
c.INSERT INTO WORKERS(ID, NAME, POSITION)
VALUES (ID, NAME, POSITION
FROM EMPLOYEES);
d.INSERT INTO WORKERS(ID, NAME, POSITION)
FROM EMPLOYEES;
 
Solution
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Which of the following is not true about complex view when using INSERT statement?
Select one:
a.You cannot add data through a view if the view includes the pseudocolumn ROWNUM keyword
b.All of the choices
c.You cannot add data through a view if the view includes:Group functions
d.You cannot modify data in a view if it contains a GROUP BY clause
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The correct answer is b. All of the choices.

All of the choices are not true about complex views when using the INSERT statement.

Option (a) is true because you cannot insert data through a view if the view includes the pseudocolumn ROWNUM keyword. The ROWNUM keyword is used to assign a unique row number to each row returned by a query, but it is not an actual...
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It is a stockkeeping record that contains the same information as the inventory control card. Unlike inventory control cards, it is bound like a book; it is used instead of the individual card format.
 
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Chizue Mizokuchi

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