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query needed

Author

Topic

soorajtnpki
Posting Yak Master

231 Posts

Posted - 2008-11-10 : 08:16:53

hi all,
i have a customers table storing tel,mobile,worktel numbers.

now i need a query which pull up customers that do not have a minimum of 2 phone numbers..
these 3 column can get null values too.
pls help

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2008-11-10 : 08:24:42

[code]
select customer from
(
select *,
case when tel<>'' then 1 else 0 end+case when mobile<>'' then 1 else 0 end+case when worktel<>'' then 1 else 0 end as counting
from table
) as t
where counting<2
[/code]

Madhivanan

Failing to plan is Planning to fail

malaytech2008
Yak Posting Veteran

95 Posts

Posted - 2008-11-10 : 08:29:10

How do u storing phone numbers,if it is different table having phone number only
then I think it work..

select p.cust_id from phone p inner join customer c
on c.cid=p.cid group by cust_id having count(cust_id)>=2

malay

soorajtnpki
Posting Yak Master

231 Posts

Posted - 2008-11-10 : 09:08:38

thanks madhivanan

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2008-11-10 : 09:20:41