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asked on
SQL where OR clause
Hi
I have the following results
Name Status date
------- ------- ------
mark 1 29/03/2014
mark 0 09/03/2014
mark 1 19/03/2014
John 0 19/03/2014
bob 1 19/03/2014
I have a the SQL
select SSNumber from tb2
where SSNumber NOT IN (select SSNumber from tbl where status =1)
But as MARK has status 0 and 1 it is showing in the list
Really i want this
if MARK has only a status 1 then it should NOT show
If MARK has Status 1 and 0 then it should NOT show
If MARK only has status 0 then it should show
What SQL would i need to do this
I guess it would be something like
select SSNumber from tbl where status =1 (or occurrence of status = 0 and another with status = 1)
hope that makes sense
this could be super simple but really tired and my brain hurts
I have the following results
Name Status date
------- ------- ------
mark 1 29/03/2014
mark 0 09/03/2014
mark 1 19/03/2014
John 0 19/03/2014
bob 1 19/03/2014
I have a the SQL
select SSNumber from tb2
where SSNumber NOT IN (select SSNumber from tbl where status =1)
But as MARK has status 0 and 1 it is showing in the list
Really i want this
if MARK has only a status 1 then it should NOT show
If MARK has Status 1 and 0 then it should NOT show
If MARK only has status 0 then it should show
What SQL would i need to do this
I guess it would be something like
select SSNumber from tbl where status =1 (or occurrence of status = 0 and another with status = 1)
hope that makes sense
this could be super simple but really tired and my brain hurts
ASKER CERTIFIED SOLUTION
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Assuming SSNumber is unique for a person (i.e., it's not primary-key):
select SSNumber
from tb2
group
by SSNumber
having max(status) = 0
ASKER
Correct social security number is unique
how can that value of SSN be unique (in that table) if you have several rows for the same person? I don't think that that field is the primary key in that table?
still, if you only need the SSN value, John's suggestion is perfectly valid.
other than that: does my suggestion work? if not, what are the example where it does not work?
still, if you only need the SSN value, John's suggestion is perfectly valid.
other than that: does my suggestion work? if not, what are the example where it does not work?
select SSNumber from tb2
WHERE status = 0 AND
SSNumber NOT IN (select SSNumber from tbl where status =1)