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Please help me with the query

Posted on 2011-03-09
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Last Modified: 2012-08-13
let say you run the query
Select * from tblMain

if you have the data you will get result:
num   name     zip
1      Steven 91356
2     Leonad 94875
and so on...
how about if you do not have anything you will get this
num   name     zip
how to modify the query and get just something like this:
0
0
Comment
Question by:rfedorov
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6 Comments
 
LVL 9
ID: 35089458
That's not how queries work.  They return records if they exist, not if they don't.  Can you tell us what you are trying to accomplish with this "zero" record?
0
 
LVL 41

Expert Comment

by:Sharath
ID: 35089494
Try this.
Select num,name,zip from tblMain
union all
select 0,null,null where not exists (select 1 from tblMain)

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0
 

Author Comment

by:rfedorov
ID: 35095788
Thank you, guys.
To ArmenStein:i need to get the count of records even if there is no records. ---in this case is Zero is my result. I need the count to add to one more query results to get the final number
To: Sharath_123: i am getting the error message
Syntax error(missing operator) in query exression 'null where not exists (select 1 from tblMain)
'
0
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LVL 41

Expert Comment

by:Sharath
ID: 35102035
Check this
Select num,name,zip from tblMain
union 
select 0,null,null from tblMain where not exists (select 1 from tblMain)

Open in new window

0
 

Author Comment

by:rfedorov
ID: 35109940
thank you, it did not give me the error, but it does not give me the zero
i added the extra field Date
what i want, i think it make more sense, show me * from the table where date is not todays

and it stll gives me just a header:
num name zip Date

and i want like that
num name zip Date
0
is this possible???
Select num,name,zip,Date from tblMain where Date =format(now,"mm/dd/yyyy")
union 
select 0,null,null,null from tblMain where not exists (select 1 from tblMain)

Open in new window

0
 
LVL 41

Accepted Solution

by:
Sharath earned 500 total points
ID: 35113342
You have to add the WHERE condition in the sub query also.
Select num,name,zip,Date from tblMain where Date =format(now,"mm/dd/yyyy")
union 
select 0,null,null,null from tblMain where not exists (select 1 from tblMain where Date =format(now,"mm/dd/yyyy"))

Open in new window

0

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