IF NULL then Zero (0)

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IF NULL then Zero (0)

EjSQLme

SSCrazy

Points: 2172
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July 28, 2010 at 7:15 am

#225520

Hi,
Using the sample data below, How would I convert Null to zero (0) if the count is NULL with out creating a temp table?
CREATE TABLE #Table_Temp
(ProdID INT
,StatusID INT
,CreatedDate DATETIME)
INSERT INTO #Table_Temp
Select 2063,1,'2009-10-18' Union
Select 1018,2,'2009-05-10' Union
Select 3013,3,'2010-01-15' Union
Select 1753,1,'2009-09-01' Union
Select 3588,3,'2010-06-07' Union
Select 674,2,'2009-04-06' Union
Select 1037,3,'2009-05-29' Union
Select 1250,3,'2009-06-15' Union
Select 504,3,'2009-01-18' Union
Select 3321,3,'2010-03-24' Union
Select 1754,1,'2009-09-01' Union
Select 528,3,'2009-02-01' Union
Select 3712,3,'2010-07-01' Union
Select 3592,3,'2010-06-07' Union
Select 3446,1,'2010-05-03' Union
Select 3421,3,'2010-04-26' Union
Select 2962,2,'2010-01-09' Union
Select 507,3,'2009-01-23' Union
Select 3369,3,'2010-04-14' Union
Select 3233,3,'2010-03-10'
select * from #Table_Temp order by CreatedDate
select
'ActiveProd' = (select count(*)
from #Table_Temp TT1
where StatusID = 1
and dateadd(month, datediff(month, 0, tt1.CreatedDate),0) = dateadd(month, datediff(month, 0, tt.CreatedDate),0)
group by dateadd(month, datediff(month, 0, CreatedDate),0)),
'InactiveProd' = (select count(*)
from #Table_Temp TT1
where StatusID = 2
and dateadd(month, datediff(month, 0, tt1.CreatedDate),0) = dateadd(month, datediff(month, 0, tt.CreatedDate),0)
group by dateadd(month, datediff(month, 0, CreatedDate),0)),
'DiscontinutedProd' = (select count(*)
from #Table_Temp TT1
where StatusID = 3
and dateadd(month, datediff(month, 0, tt1.CreatedDate),0) = dateadd(month, datediff(month, 0, tt.CreatedDate),0)
group by dateadd(month, datediff(month, 0, CreatedDate),0)),
(convert(varchar(4),dateadd(month, datediff(month, 0, CreatedDate),0),100) + convert(varchar(4),year(dateadd(month, datediff(month, 0, CreatedDate),0)))) as ProdCountDT
from #Table_Temp TT
where dateadd(month, datediff(month, 0, CreatedDate),0) between getdate() - 365 and getdate()
group by dateadd(month, datediff(month, 0, CreatedDate),0)
order by dateadd(month, datediff(month, 0, CreatedDate),0)
drop table #Table_Temp

Viewing 7 posts - 1 through 6 (of 6 total)

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jvanderberg SSCertifiable Points: 6762 More actions · Answer 1

ISNULL() does exactly that:

ISNULL([Field],0)

This returns 0 if [Field] is NULL, otherwise it will return [Field].

But I prefer COALESCE() because it is a little more flexible:

COALESCE([Field],0)

The above code does exactly the same thing as ISNULL(). But COALESCE() can do a little bit more:

COALESCE([Field1],[Field2],[Field3],...,0)

COALESCE() scans through each parameter in order, returning the first non-null one. In this case I added 0 at the end to catch an situation where all of the fields are NULL.

Cadavre SSC-Forever Points: 41690 More actions · Answer 2

Isnull is your friend 🙂

SELECT 'ActiveProd' = Isnull((SELECT COUNT(*)

FROM #table_temp tt1

WHERE statusid = 1

AND Dateadd(MONTH, Datediff(MONTH, 0,

tt1.createddate), 0) =

Dateadd(MONTH, Datediff(MONTH, 0,

tt.createddate), 0)

GROUP BY Dateadd(MONTH, Datediff(MONTH, 0,

createddate),

0)), 0),

'InactiveProd' = Isnull((SELECT COUNT(*)

FROM #table_temp tt1

WHERE statusid = 2

AND Dateadd(MONTH, Datediff(MONTH, 0,

tt1.createddate), 0) =

Dateadd(MONTH, Datediff(MONTH, 0,

tt.createddate), 0)

GROUP BY Dateadd(MONTH, Datediff(MONTH, 0,

createddate

), 0)), 0),

'DiscontinutedProd' = Isnull((SELECT COUNT(*)

FROM #table_temp tt1

WHERE statusid = 3

AND Dateadd(MONTH, Datediff(MONTH, 0

,

tt1.createddate), 0) =

Dateadd(MONTH, Datediff(MONTH, 0,

tt.createddate), 0)

GROUP BY Dateadd(MONTH, Datediff(MONTH, 0,

createddate), 0)), 0),

( CONVERT(VARCHAR(4), Dateadd(MONTH, Datediff(MONTH, 0, createddate), 0), 100) +

CONVERT(VARCHAR(4), YEAR(Dateadd(MONTH, Datediff(MONTH, 0, createddate), 0)))

) AS prodcountdt

FROM #table_temp tt

WHERE Dateadd(MONTH, Datediff(MONTH, 0, createddate), 0) BETWEEN

Getdate() - 365 AND Getdate()

GROUP BY Dateadd(MONTH, Datediff(MONTH, 0, createddate), 0)

ORDER BY Dateadd(MONTH, Datediff(MONTH, 0, createddate), 0)

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EjSQLme SSCrazy Points: 2172 More actions · Answer 3

EjSQLme

SSCrazy

Points: 2172

July 28, 2010 at 7:29 am

#1199225

Okay Thank you guys

matzer SSCrazy Eights Points: 9727 More actions · Answer 4

And to simplify things ...

select

'ActiveProd' = COUNT(CASE WHEN StatusID = 1 THEN 1 END),

'InactiveProd' = COUNT(CASE WHEN StatusID = 2 THEN 1 END),

'DiscontinutedProd' = COUNT(CASE WHEN StatusID = 3 THEN 1 END),

(convert(varchar(4),dateadd(month, datediff(month, 0, CreatedDate),0),100) + convert(varchar(4),year(dateadd(month, datediff(month, 0, CreatedDate),0)))) as ProdCountDT

from #Table_Temp TT

where dateadd(month, datediff(month, 0, CreatedDate),0) between getdate() - 365 and getdate()

group by dateadd(month, datediff(month, 0, CreatedDate),0)

order by dateadd(month, datediff(month, 0, CreatedDate),0)

mimi 41746 Valued Member Points: 57 More actions · Answer 5

select
'ActiveProd' = COUNT(CASE WHEN StatusID = 1 THEN 1 END),
'InactiveProd' = COUNT(CASE WHEN StatusID = 2 THEN 1 END),
'DiscontinutedProd' = COUNT(CASE WHEN StatusID = 3 THEN 1 END),
(convert(varchar(4),dateadd(month, datediff(month, 0, CreatedDate),0),100) + convert(varchar(4),year(dateadd(month, datediff(month, 0, CreatedDate),0)))) as ProdCountDT
from #Table_Temp TT
where dateadd(month, datediff(month, 0, CreatedDate),0) between getdate() - 365 and getdate()
group by dateadd(month, datediff(month, 0, CreatedDate),0)
order by dateadd(month, datediff(month, 0, CreatedDate),0)

Luis Cazares SSC Guru Points: 183706 More actions · Answer 6

To simplify even more:
SELECT ActiveProd = COUNT( CASE WHEN StatusID = 1 THEN ProdID END), InactiveProd = COUNT( CASE WHEN StatusID = 2 THEN ProdID END), DiscontinutedProd = COUNT( CASE WHEN StatusID = 3 THEN ProdID END), ProdCountDT = RIGHT( CONVERT(varchar(11),DATEADD(MM, DATEDIFF(MM, 0, CreatedDate),0), 106),8) FROM #Table_Temp TT --WHERE dateadd(month, datediff(month, 0, CreatedDate),0) BETWEEN getdate() - 365 and getdate() GROUP BY DATEDIFF(MM, 0, CreatedDate) ORDER BY ProdCountDT;

Luis C.
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