I'm currently in the middle of creating a report witch is parameter based and want to use a case when statement within my where clause.
Declare #TPS Varchar(152) = 'Include'
And (CASE WHEN #TPS = 'Include' THEN (TPS is null or (TPS = '')) ELSE (TPS IS NOT NULL) END)
above is the sample of what i'm trying to do. I cannot use a begin and end as i want to have 7 case whens within my statement so the user in SSRS can pass the values through into the report and that will be a lot of combinations.
I want to be able to pass through a parameter and in turn change my where clause.
You can have a case statement, or a series of case statements, in a where clause:
Declare #TPS Varchar(152) = 'Include'
select * from someTable
WHERE CAT = 'Spot' AND
CASE
WHEN #TPS = 'Include' then true
WHEN #TPS = null or #TPS = '' then false
WHEN #TPS not = null then true
else false
END
Just think of the case statement as returning a true or false
I have two columns Speed_A and Speed_B.
Now I will compare both columns and will select the higher one in a new table.
Something like this:
SELECT ...
CASE
WHEN a.Speed_A > a.Speed_B THEN a.Speed_A
WHEN a.Speed_A < a.Speed_B THEN a.Speed_B
ELSE 0 --unknown
END as SpeedLimit,
How does it work?
Assuming your speeds are numerically typed you might get this as easy as:
SELECT CASE WHEN a.Speed_A>a.Speed_B THEN a.Speed_A ELSE a.Speed_B END AS SpeedLimit
[...FROM SomeWhere...]
Your ELSE will only occur, when A and B are equal, In this case it doesn't matter, which one you return.
UPDATE
column´s data type is integer. And yes there are nulls
If A is null return B, If b is null return A (works for A and B is null implicitly). Otherwise both are not null and therefore the statement above should be perfect
SELECT CASE WHEN a.Speed_A IS NULL THEN a.Speed_B
ELSE CASE WHEN a.Speed_B IS NULL THEN a.Speed_A
ELSE CASE WHEN a.Speed_A>a.Speed_B THEN a.Speed_A ELSE a.Speed_B
END
END
END AS SpeedLimit
FROM Dummy
[...FROM SomeWhere...]
You can create a inline max function that return the max between two values something like:
create function dbo.InlineMax(#val1 int, #val2 int)
returns int
as
begin
if #val1 > #val2
return #val1
return isnull(#val2,#val1)
end
and you can use it like this:
SELECT dbo.InlineMax(a.Speed_A, a.Speed_B)
FROM ....
Nested Case and Case without Column Name
select
CASE ColumnName
WHEN 'enter value on which you want to execute Than Block'
THEN
CASE ColumnName
WHEN 1 THEN 'return value or Column Name'
ELSE 'return value or Column Name in case of else'
END
WHEN 'another condition, value of column on which you want to execute then block'
THEN
CASE WHEN 'Condition etc => ColumnName > 5 or ColumnName ='abc' ' THEN 'return value or column name' ELSE 'return value or column name' END
ELSE 'return value or column name'
END as status
FROM TableName
I have a parameter #Destinataire in SSRS that has a list of values plus an empty string
I've created a query that I set as available values, which gives me the drop down list
SELECT code_name FROM tableA UNION ALL SELECT ''
When running the reports with the empty string, I have no results
I tried to set the parameter as text box and it does not do anything too
Yet when running the sql query I'm using to run this report, things are fine as I have all my rows retrieved (see query below)
DECLARE #DateCmt DATE = '05/09/2015',
#DateFin DATE = '05/09/2016',
#Restriction INT = 1,
#Destinataire VARCHAR(5) = ''
--
;
--SELECT #DateCmt,#DateFin
SELECT DISTINCT
CFE_EDI.IU_LIASSE
,CFE_EDI.ETAT
,CFE_EDI.DATHRMAJ -- nouveau
,CFE_EDI.ESP_APPLI
,CFE_EDI.NOM_RS
,PARTENAIRES.LIBEL
,PARTENAIRES.CODE_INSEE
,CFE_EDI.DATHR_ENV -- nouveau
,CFE_EDI.DATHR_MEF -- nouveau
,CFE_EDI.DATHR_PRE -- nouveau
,CFE_EDI.DATHR_OUV -- nouveau
--,CFE_EDI.DATEHR_DEPOT-- mettre l'heure
,CFE_EDI.GESTDEL
--,CFE_SERVICE_DEST.IU_DEST
--,CFE_SERVICE.IU_LIASSE
,CASE WHEN CFE_EDI.ETAT = 'MEF' THEN 'En Attente le'
WHEN CFE_EDI.ETAT = 'PRE' THEN 'Préparé le'
WHEN CFE_EDI.ETAT = 'ENV' THEN 'Envoyé le'
WHEN CFE_EDI.ETAT = 'OUV' THEN 'Réceptionné le'
WHEN CFE_EDI.ETAT = 'NRM' THEN 'Non remis le'
WHEN CFE_EDI.ETAT = 'NAQ' THEN 'Non acquitté le'
END AS ChampEtat
,CASE WHEN CFE_EDI.ETAT = 'OUV' THEN 'Date d''envoi : ' + CONVERT(VARCHAR,CFE_EDI.DATHR_ENV,103)
END AS Date_Envoi,
CASE
WHEN CFE_EDI.ETAT='MEF' THEN CONVERT(VARCHAR,CFE_EDI.DATHR_MEF,103)
WHEN CFE_EDI.ETAT='PRE' THEN CONVERT(VARCHAR,CFE_EDI.DATHR_PRE,103)
WHEN CFE_EDI.ETAT='ENV' THEN CONVERT(VARCHAR,CFE_EDI.DATHR_ENV,103)
WHEN CFE_EDI.ETAT='OUV' THEN CONVERT(VARCHAR,CFE_EDI.DATHR_OUV,103)
ELSE CONVERT(VARCHAR,CFE_EDI.DATHR_DEPOT,103) END AS DateMaj ,
CASE
WHEN CFE_EDI.ETAT='MEF' then CONVERT(VARCHAR,CFE_EDI.DATHR_MEF,108)
WHEN CFE_EDI.ETAT='PRE' then CONVERT(VARCHAR,CFE_EDI.DATHR_PRE,108)
WHEN CFE_EDI.ETAT='ENV' then CONVERT(VARCHAR,CFE_EDI.DATHR_ENV,108)
WHEN CFE_EDI.ETAT='OUV' then CONVERT(VARCHAR,CFE_EDI.DATHR_OUV,108)
ELSE CONVERT(VARCHAR,CFE_EDI.DATHR_DEPOT,108) END AS HeureMaj,
PARTENAIRES.LIBEL + '(' + CFE_EDI.CODE_INSEE + ')' AS LibelDestinataire
--,CASE WHEN #Restriction = 1 THEN '1'
-- WHEN #Restriction = 0 THEN '0' END AS Restriction
,CASE WHEN #DateCmt != #DateFin AND #DateCmt < #DateFin THEN 'Diffusion Xml du ' + CONVERT(VARCHAR,(#DateCmt),103) + ' au ' + CONVERT(VARCHAR,(#DateFin),103) ELSE
'Diffusion EDI Xml du ' + CONVERT(VARCHAR,#DateCmt,103) END AS Plage_Diffusion
-- INTO
FROM
(PARTENAIRES
INNER JOIN dbo.CFE_EDI ON PARTENAIRES.CODE_INSEE = CFE_EDI.CODE_INSEE)
INNER JOIN dbo.CFE_SERVICE ON CFE_EDI.IU_LIASSE = CFE_SERVICE.IU_LIASSE
INNER JOIN dbo.CFE_SERVICE_DEST ON (PARTENAIRES.IU_PART = CFE_SERVICE_DEST.IU_PART_CFE)
WHERE
case when #Restriction = 1
then case when CFE_EDI.ETAT in('ENV','OUV') then 1 else 0 end
when #Restriction = 0
then case when CFE_EDI.ETAT not in('ENV','OUV') then 1 else 0 end
else case when CFE_EDI.ETAT <> '' then 1 else 0 end
end = 1
AND
CFE_EDI.CODE_INSEE IS NOT NULL AND CFE_EDI.CODE_INSEE != ''
AND CASE --WHEN CFE_EDI.CODE_INSEE IS NOT NULL AND CFE_EDI.CODE_INSEE !=''
--THEN CASE
WHEN #Destinataire != '' AND (#Destinataire) IS NOT NULL
THEN CASE WHEN CFE_EDI.CODE_INSEE = #Destinataire THEN 1 ELSE 0 END
ELSE CASE WHEN CFE_EDI.CODE_INSEE = PARTENAIRES.CODE_INSEE
AND cfe_edi.dathrmaj > #DateCmt AND cfe_edi.dathrmaj < #DateFin
AND CFE_EDI.GESTDEL = '1' THEN 1 ELSE 0 END
END = 1
First question would be to know if there is way to setup the parameter without using my stupid trick.
Second question is why the query with parameter with an empty string does the trick and once you use SSRS, nothing.
Thanks in advance for your help
Update I tried to set the WHEN LEN(#Destinataire) > 0 with the #Destinataire = '' but no luck on that one.
Update 2 My aim now is to have a solution that will retrieve all the datas, in case the #Destinataire is equal to '' or NULL. However, thinking about it, this solution is equivalent to having all the values populated in #Destinataire. So one way or another, I would say.
Final update I've recreated everything from scratch and oh! magic, the grouping or the everything option worked as wish. I still don't know what was wrong but I'm fine with the results. Many thanks for your help and support.
looking at your query and where you pass #Destinataire you should be able to pass a null value according to the where clause and get the same effect as passing ''
CASE --WHEN CFE_EDI.CODE_INSEE IS NOT NULL AND CFE_EDI.CODE_INSEE !=''
--THEN CASE
WHEN #Destinataire != '' AND (#Destinataire) IS NOT NULL
THEN CASE WHEN CFE_EDI.CODE_INSEE = #Destinataire THEN 1 ELSE 0 END
ELSE CASE WHEN CFE_EDI.CODE_INSEE = PARTENAIRES.CODE_INSEE
AND cfe_edi.dathrmaj > #DateCmt AND cfe_edi.dathrmaj < #DateFin
AND CFE_EDI.GESTDEL = '1' THEN 1 ELSE 0 END
END = 1
I would try to just set that particular paramter to allow nulls in the ssrs report which can be found as a checkbox in your parameter settings window.
There is a hybrid option, where you can keep your visible parameter just as you have it, but then use a hidden cascaded parameter to reference in the query. So if you really are having trouble with formulating your query with blank or null values as a parameter, this will work around that. Here are the steps:
Create a new dataset.
A slight catch, you do need to make sure that the changing the selection always adds a new value to force a refresh of the cascaded parameter, but that's easy to do:
SELECT code_name FROM tableA WHERE #Destinataire='' OR #Destinataire=code_name
--Dummy value needed to force update of parameter value in some cases:
UNION SELECT 'zz' + #Destinataire AS code_name
Set up a new parameter, #MultiDestataire. Allow it to accept multiple values and use the new dataset as its available and default values. Set its visibility to Hidden.
Running the report before hiding the new parameter shows how it works:
Edit the query to use the new multivalue parameter in its WHERE clause.
From here on, this is just altering the query to use the IN statement, which should look like this:
CFE_EDI.CODE_INSEE IS NOT NULL AND CFE_EDI.CODE_INSEE != ''
AND CFE_EDI.CODE_INSEE IN (#MultiDestinataire)
...
Attempting this may end up being an intermediary step if you've got some other issue in the query that's responsible for unexpected results, as you should be able to test for an empty value there.
This is just my two cents, basically you have two options here.
Multivalue parameter Option
Define your parameter to allow multivalues, use the same dataset in Available values and Default values properties. So when your user doesn't select any value the parameter will be populated with all values. Otherwise your parameter will be populated only with values your users select.
In this case you will have to use IN operator since your parameter represent multiple values seleted or not by your user.
...
WHERE CFE_EDI.CODE_INSEE IN (#Destinataire)
...
When you use Default values property all drop down list values are selected by default and your report run without any filter being applied (at least if your user doesn't select any value or values).
Additional, I'd avoid use '' (blank), it is uninformative and your user might think it is some kind of error or your parameter was not populated properly.
Why use a single value parameters when you want to show data from more than one value (in your case all)?
Single value Option (No sense IMO)
In order to this works you have to set your parameter to Allow blank value ("") and Allow null value. Your query should look like this:
WHERE
CASE WHEN #Destinataire = '' OR #Destinataire is null THEN 1 ELSE 0 END = 1
OR
CFE_EDI.CODE_INSEE = #Destinataire
In your query I think it could be something like this:
WHERE CASE
WHEN #Restriction = 1 THEN
CASE
WHEN cfe_edi.etat IN( 'ENV', 'OUV' ) THEN 1
ELSE 0
END
WHEN #Restriction = 0 THEN
CASE
WHEN cfe_edi.etat NOT IN( 'ENV', 'OUV' ) THEN 1
ELSE 0
END
ELSE
CASE
WHEN cfe_edi.etat <> '' THEN 1
ELSE 0
END
END = 1
AND cfe_edi.code_insee IS NOT NULL
AND cfe_edi.code_insee != ''
AND ( CASE
--WHEN CFE_EDI.CODE_INSEE IS NOT NULL AND CFE_EDI.CODE_INSEE !=''
--THEN CASE
WHEN ( #Destinataire = ''
OR #Destinataire IS NULL )
AND cfe_edi.code_insee = partenaires.code_insee
AND cfe_edi.dathrmaj > #DateCmt
AND cfe_edi.dathrmaj < #DateFin
AND cfe_edi.gestdel = '1' THEN 1
ELSE 0
END = 1
OR cfe_edi.code_insee = #Destinataire )
Also consider this evaluation AND cfe_edi.code_insee = partenaires.code_insee, is it necessary even if your JOIN operator is forcing to meet the condition? INNER JOIN dbo.CFE_EDI ON PARTENAIRES.CODE_INSEE = CFE_EDI.CODE_INSEE
A third option could be use a hidden parameter to clean the null and '' option of the user to produce a parameter populated with all values. Try the options above before get involved with hidden/internal parameter approach.
Let me know if this helps.
I'm trying to do the following which involves a complex query;
1. First I try to select the column based on some logic
2. then based on the value of the selected column a value is selected
3. finally based on the previous value a logic is applied to get the final value
How can I have the result from 2 in the ELSE of the 3rd Case..Then statement ?
CASE
CASE
CASE
WHEN MDC.Network ='I' THEN INNBenefitID ELSE OONBenefitID
END
WHEN 'INNDWO' THEN CASE WHEN DWO.Description IS NOT NULL THEN DWO.Description ELSE MDC.CostShareValue END
WHEN 'OONDWO' THEN CASE WHEN DWO.Description IS NOT NULL THEN DWO.Description ELSE MDC.CostShareValue END
ELSE isnull(dbo.fn_FormatText(MDC.CostShareValue, CostShareType),'''')
END
WHEN '0%' THEN 'Covered 100%'
WHEN '$0' THEN 'Covered 100%'
ELSE ????
END
Are you looking for something like that? :
declare #value varchar(255) = (
CASE
WHEN MDC.Network ='I' THEN INNBenefitID ELSE OONBenefitID
WHEN 'INNDWO' THEN CASE WHEN DWO.Description IS NOT NULL THEN DWO.Description ELSE MDC.CostShareValue
WHEN 'OONDWO' THEN CASE WHEN DWO.Description IS NOT NULL THEN DWO.Description ELSE MDC.CostShareValue
ELSE isnull(dbo.fn_FormatText(MDC.CostShareValue, CostShareType),'''')
END
)
CASE
WHEN '0%' THEN 'Covered 100%'
WHEN '$0' THEN 'Covered 100%'
ELSE #value
END
Really, really hard to do this right without a schema or sample data. In the future consider creating a SqlFiddle for us. But one approach you might consider is using a Common Table Expression (CTE) to define an intermediary structure which you then query.
;WITH theCTE AS (SELECT
CASE
CASE
WHEN MDC.Network ='I' THEN INNBenefitID ELSE OONBenefitID
END
WHEN 'INNDWO' THEN COALESCE(DWO.Description, MDC.CostShareValue)
WHEN 'OONDWO' THEN COALESCE(DWO.Description, MDC.CostShareValue)
ELSE COALESCE(dbo.fn_FormatText(MDC.CostShareValue, CostShareType), '')
END AS foo
FROM
bar
)
SELECT
CASE
WHEN foo IN ('0%', '$0') THEN 'Covered 100%'
ELSE '' -- Do something with foo --
END AS finalColumn
FROM
theCTE
Basically, I want to return a 1 if the Field Blue is a 'Y' and a blank if it is not. Is this how I should go about this?
Case isnull(Blue, 'N') when Blue = 'Y' then 1 else '' end
Your null check is redundant. You only need to test for 'Y':
Case when Blue = 'Y' then '1' else '' end
you can do either
Case isnull(Blue, 'N') when 'Y' then '1' else '' end
or
Case when isnull(Blue, 'N') = 'Y' then '1' else '' end
see case