need help with the query

Question

1.00/5 (1 vote)

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Hi
I want to get the maker who sells pc but not laptops the desired output is E,pl refer the attached file for the table structure

VB

product 
maker model type
A     1232  PC
A     1233  PC
A     1276  Printer
A     1298  Laptop
A     1401  Printer
A     1408  Printer
A     1752  Laptop
B     1121  PC
B     1750  Laptop
C     1321  Laptop
D     1288  Printer
D     1433  Printer
E     1260  PC
E     1434  Printer
E     2112  PC
E     2113  PC

Posted 4-Jun-12 19:01pm

Shashwath7

Updated 4-Jun-12 19:02pm

Prasad_Kulkarni

v2

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Comments

Sandeep Mewara 5-Jun-12 11:01am

Homework! No effort.

5 solutions

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Rahul Rajat Singh · Answer 1 · 2012-06-04T19:35:00

Solution 5

I think this might be the right solution for you which will give answer as 'E' only

SQL

SELECT     distinct(maker)
FROM         Product
WHERE     type = 'pc'
except

SELECT     distinct(maker)
FROM         product
WHERE     type = 'laptop';

try it and let me know if it works or not.

Posted 4-Jun-12 19:35pm

Rahul Rajat Singh

Prosan · Answer 2 · 2012-06-04T19:22:00

Solution 4

as i understand your query write like this

SQL

select distinct E from product where type='PC'

Posted 4-Jun-12 19:22pm

Prosan

Comments

Rahul Rajat Singh 5-Jun-12 2:08am

The result of this would be:
A
B
E

Mehdi Gholam · Answer 3 · 2012-06-04T19:21:00

Solution 3

You should use:

SQL

select * from ( select * from Product where type <> 'laptop') as t where t.type = 'pc'

Posted 4-Jun-12 19:21pm

Mehdi Gholam

Comments

Rahul Rajat Singh 5-Jun-12 2:13am

I am sorry but i dont understand how is this correct. the result for this query is:

A 1232 PC
A 1233 PC
B 1121 PC
E 1260 PC
E 2112 PC
E 2113 PC

I think he need to find the maker who makes PC and not laptops. Is my understanding wrong? I think he want answer to be 'E' in this particular case.

Arunprasath Natarajan · Answer 4 · 2012-06-04T19:17:00

Solution 2

Dear Friend,

Hope this will work.

SQL

Select * from My_Table with (Nolock) where type='PC' and maker not in (Select maker from My_Table with (Nolock) where type='Laptop')

Regards,
AP

Posted 4-Jun-12 19:17pm

Arunprasath Natarajan

Updated 4-Jun-12 19:23pm

v2

RDBurmon · Answer 5 · 2012-06-04T19:10:00

Solution 1

SQL

SELECT * FROM Product WHERE type not in ('Laptop')

Hope this helps , If yes then plz accept and vote the answer. Any queries / questions on this are always welcome.

Thanks & Regards
RDBurmon.Sr.Software Engineer

Posted 4-Jun-12 19:10pm

RDBurmon

Comments

Arunprasath Natarajan 5-Jun-12 1:21am

Your query will give the data of Maker(D) who sells printer also.

Mehdi Gholam 5-Jun-12 1:22am

Partially right, see my answer.