what will be the output of the below given query, if no
matching records are found : (a.) 0 (b.) null (c.) error
select Avg(salary)
from TableA
where Deptno = 'insurance'
Answers were Sorted based on User's Feedback
Answer / rama krishna reddy
b
if no matching records found then it will return null value
Is This Answer Correct ? | 36 Yes | 3 No |
Answer / guest.
Lalit, I contradict your answe because the question itself
says that there is no matching record with
deptno='insurance'. So (b)is the correct answer.
Is This Answer Correct ? | 20 Yes | 1 No |
Answer / pankaj
ans is a) ZERO
the anser is ZERO because there is no record in the table
they can shows the zero value present in the table
0 record is selected
message is disply
Is This Answer Correct ? | 2 Yes | 2 No |
Answer / mr.perfect
error +100 we will get, record not found.......
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / shailendra
It will be error, as we are using where with AVG function....we should use having
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / swapnil
It depends up on the which database we are using. I m using
PostgreSQL it is in open source.It returns 0 value.
Is This Answer Correct ? | 1 Yes | 2 No |
Answer / lalit
Hi,
My understanding is different so it can be a or b. Assume
that there are 10 records and this column can have null
values. If 9 records have null and one record has vale as
zero then the answer would be zero and if all of them have
null then the answer would be null. If no rows satifies the
criteria then it would be null.
Is This Answer Correct ? | 5 Yes | 7 No |
what are the frequent DB2 abends did you encounter in your programs ?? What are different SQL abends ??
What are bind parameters in db2?
What is syscat in db2?
How do you declare a host variable (in COBOL) for an attribute named emp-name of type VARCHAR(25) ?
Which transaction use a command thread ?
What does CURRENTDATA option in bind indicate
What are host variables in db2?
what is the certification that has a good value for a practioner in mainframes but not habving much knowledge on db2 related stuff?
cobol-db2 runjcl please?
How does cobol compile db2 program?
What is a buffer in memory?
What is a lock?