Average of CASE WHEN field - sql

How can I get the average of the column TotalTeamMembership?
SELECT Player,
CASE WHEN Basketball = '' THEN 0 ELSE 1 END +
CASE WHEN Baseball = '' THEN 0 ELSE 1 END +
CASE WHEN Football = '' THEN 0 ELSE 1 END AS TotalTeamMembership
FROM PlayerMembership;
This is what I currently get:
This is what I need:
Thank you for any guidance!

You can use AVG():
SELECT AVG(CASE WHEN Basketball = '' THEN 0.0 ELSE 1 END +
CASE WHEN Baseball = '' THEN 0 ELSE 1 END +
CASE WHEN Football = '' THEN 0 ELSE 1 END
) AS avg_TotalTeamMembership
FROM PlayerMembership;

You could use AVGaggregate function:
SELECT AVG(TotalTeamMembership)
FROM (SELECT Player,
CASE WHEN Basketball = '' THEN 0 ELSE 1 END +
CASE WHEN Baseball = '' THEN 0 ELSE 1 END +
CASE WHEN Football = '' THEN 0 ELSE 1 END AS TotalTeamMembership
FROM PlayerMembership) s;

Related

Concatenation by using CASE statement

I want to CONCAT between this on my SELECT statement in SQL Server.
All the columns are booleans.
The output will be like this if all of columns that are true
GGPNES
I tried to use this and it doesn't work
DECLARE #concat VARCHAR(40) ='';
SELECT
Smoke, Invoice,
Party, Summary,
MySelf, Export,
CASE
WHEN MyTable.Smoke = 1 OR MyTable.Invoice = 1
THEN #concat + 'GG'
WHEN MyTable.Party = 1
THEN #concat + 'P'
WHEN MyTable.Summary = 1
THEN #concat + 'N'
WHEN MyTable.MySelf = 1
THEN #concat + 'E'
WHEN MyTable.Export = 1
THEN #concat + 'S'
END
FROM
MyTable
I think that you want a concatenation of CASE expressions:
CASE WHEN Smoke = 1 OR Invoice = 1 THEN 'GG' ELSE '' END +
CASE WHEN Party = 1 THEN 'P' ELSE '' END +
CASE WHEN Summary = 1 THEN 'N' ELSE '' END +
CASE WHEN MySelf = 1 THEN 'E' ELSE '' END +
CASE WHEN Export = 1 THEN 'S' ELSE '' END

If else ladder using Case in sql server

I am trying to write if elif ladder in SQL but I am finding it little difficult to do that. My ladder looks like below.
IF (MortgageProduct.FreeLegalFees != NULL) THEN
IF(MortgageProduct.FreeLegalFees==1) THEN
Return TRUE as FreeLegalFees
ELSE
Return FALSE as FreeLegalFees
ELSE
IF (ConveyancerFee!=NULL) THEN
IF ConveyancerFee.AMOUNT = 0.0 then
Return TRUE as FreeLegalFees
ELSE
Return FALSE as FreeLegalFees
END IF
ELSE
IF (LenderFee!=NULL) THEN
IF LenderFee.AMOUNT = 0.0 then
Return TRUE as FreeLegalFees
ELSE
Return FALSE as FreeLegalFees
END IF
ELSE
Return TRUE as FreeLegalFees
END IF
I know that I have to use Case for that in SQL but I am confuse in writing Case statement in sql. Can somebody please help me to frame this ladder in sql server.
This is far more succinct. I have also aliased what I assume are your table names:
CASE WHEN MP.FreeLegalFees IS NOT NULL THEN IIF(MP.FreeLegalFees = 1,1,0)
WHEN CF.AMOUNT IS NOT NULL THEN IIF(CF.AMOUNT = 0,1,0)
WHEN LF.Amount IS NOT NULL THEN IIF(LF.AMOUNT = 0,1,0)
ELSE 1 END
/*
MP MortgageProduct
CF ConveyancerFee
LF LenderFee
*/
I would write this as:
(case when mp.FreeLegalFees = 1 then 1
when mp.FreeLegalFees is not null then 0
when cf.amount = 0.0 then 1
when cf.amount is not null then 0
when lf.amount = 0.0 then 1
when lf.amount is not null then 0
else 1
end) as FreeLegalFees
CASE
WHEN MP.FREELEGALFEES = 1 THEN 1
WHEN MP.CONVEYANCERLEGALFEESET IS NOT NULL THEN
(
CASE
WHEN (
(SELECT AMOUNT FROM CONVEYANCERLEGALFEE WHERE LOCATION=#p_iLocation
and TYPEOFAPPLICATION=#p_iTypeOfApplication
and TYPEOFBUYER=#p_iTypeOfBuyer and MAXIMUMVALUE=100000
and CONVEYANCERLEGALFEESETSTRTDATE <= (SELECT GETDATE())
and CONVEYANCERLEGALFEESET = MP.CONVEYANCERLEGALFEESET ) = 0.0)
THEN 1
ELSE 0
END
)
WHEN ((Select COUNT(FEESET) FROM LEGALFEE WHERE TYPEOFAPPLICATION=#p_iTypeOfApplication
AND FEETYPE = (Select VALUEID from COMBOVALUE where VALUENAME='Redeeming')) >= 1 ) THEN
(
CASE
WHEN (
(SELECT AMOUNT FROM LEGALFEE
WHERE TYPEOFAPPLICATION = #p_iTypeOfApplication
AND FEETYPE= (SELECT VALUEID FROM COMBOVALUE WHERE VALUENAME='Redeeming')) = 0.0)
THEN 1
ELSE 0
END
)
ELSE 1
This is the solution which works perfect. Thank you all.
CASE
WHEN MortgageProduct.FreeLegalFees IS NOT NULL
THEN (
CASE
WHEN MortgageProduct.FreeLegalFees = 1
THEN 'TRUE'
ELSE 'FALSE'
END
)
WHEN ConveyancerFee IS NOT NULL
THEN (
CASE
WHEN ConveyancerFee.AMOUNT = 0.0
THEN 'TRUE'
ELSE 'FALSE'
END
)
WHEN LenderFee IS NOT NULL
THEN (
CASE
WHEN LenderFee.AMOUNT = 0.0
THEN 'TRUE'
ELSE 'FALSE'
END
)
ELSE 'TRUE'
END AS FreeLegalFees

Combining SQL string alias into comma delimited string

I am working on this stored proc which check to see which BIT fields are true and depending on it assigns a text to it using alias name. I want to be able to combine these alias values (string) and have it comma delimited to I can display it on my SSRS report.
Below is part of my stored proc.
,CASE
WHEN sr.[ReservationAlreadySentAttached] = 1 THEN 'Reservation Already Sent'
END AS ReservationAttached
,CASE
WHEN sr.[HPOfficeAttached] = 1 THEN 'H&P Office'
END AS HPOfficeAttached
WHEN sr.[NotesAttached] = 1 THEN 'Notes'
END AS NotesAttached
,CASE
WHEN sr.[OpPermitAttached] = 1 THEN 'Op Permit'
END AS OpPermitAttached
,CASE
WHEN sr.[TestResultsAttached] = 1 THEN 'Test Results'
END AS TestResultsAttached
,CASE
WHEN sr.[ConsultationReportsAttached] = 1 THEN 'Consultation Reports'
END AS ConsultationReportsAttached
,CASE
WHEN sr.[OtherAttached] = 1 THEN 'Other'
END AS OtherAttached
so lets say in case where only NotesAttached and ReservationAlreadySentAttached were only true ones then I want the end result to come out as Notes, Reservation Already Sent.
How do i concatenate these aliases ?
Another option is to build your string and then just remove the leading comma with STUFF()
Example (abbreviated)
Declare #YourTable table (ReservationAlreadySentAttached bit,HPOfficeAttached bit,NotesAttached bit)
Insert Into #YourTable values
(1,0,1)
Select NewValue = stuff(
case when ReservationAlreadySentAttached = 1 then ', Reservation Already Sent' else '' end
+case when HPOfficeAttached = 1 then ', H&P Office' else '' end
+case when NotesAttached = 1 then ', Notes' else '' end
,1,2,'')
From #YourTable
Returns
NewValue
Reservation Already Sent, Notes
EDIT - Just the Expression
NewValue = stuff(
case when sr.[ReservationAlreadySentAttached] = 1 then ', Reservation Already Sent' else '' end
+case when sr.[HPOfficeAttached] = 1 then ', H&P Office' else '' end
+case when sr.[NotesAttached] = 1 then ', Notes' else '' end
,1,2,'')
Not the prettiest solution...
RIGHT((CASE
WHEN sr.[ReservationAlreadySentAttached] = 1
THEN ',Reservation Already Sent'
END + CASE
WHEN sr.[HPOfficeAttached] = 1
THEN ',H&P Office'
END + CASE
WHEN sr.[NotesAttached] = 1
THEN ',Notes'
END + CASE
WHEN sr.[OpPermitAttached] = 1
THEN ',Op Permit'
END + CASE
WHEN sr.[TestResultsAttached] = 1
THEN ',Test Results'
END + CASE
WHEN sr.[ConsultationReportsAttached] = 1
THEN ',Consultation Reports'
END + CASE
WHEN sr.[OtherAttached] = 1
THEN ',Other'
END)
,LEN(CASE
WHEN sr.[ReservationAlreadySentAttached] = 1
THEN ',Reservation Already Sent'
END + CASE
WHEN sr.[HPOfficeAttached] = 1
THEN ',H&P Office'
END + CASE
WHEN sr.[NotesAttached] = 1
THEN ',Notes'
END + CASE
WHEN sr.[OpPermitAttached] = 1
THEN ',Op Permit'
END + CASE
WHEN sr.[TestResultsAttached] = 1
THEN ',Test Results'
END + CASE
WHEN sr.[ConsultationReportsAttached] = 1
THEN ',Consultation Reports'
END + CASE
WHEN sr.[OtherAttached] = 1
THEN ',Other'
END) - 1 )
Edit: You may have to take into consideration when NONE of them are 1 so you don't get Invalid length parameter passed to the right function.
CASE
WHEN sr.[ReservationAlreadySentAttached] = 1 THEN ', Reservation Already Sent' ELSE ''
END
+ CASE
WHEN sr.[HPOfficeAttached] = 1 THEN ', H&P Office' ELSE ''
END
+ CASE etc...
And wrap this in some function to remove the first comma + space.

How to count up a single character in multiple fields in SQL

HI i have a table 'TableCustomers' and within this table are many fields titled 'Name1' 'Name2''Name3'.... 'Name40' some of these fields just have the letter 'x' i want to know how many 'x' are there in all 40 fields
One possible solution is something like;
SELECT
CASE WHEN [Name] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name1] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name2] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name3] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name4] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name5] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name6] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name7] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name8] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name9] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name10] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name11] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name12] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name13] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name14] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name15] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name16] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name17] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name18] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name19] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name20] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name21] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name22] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name23] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name24] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name25] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name26] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name27] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name28] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name29] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name30] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name31] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name32] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name33] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name34] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name35] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name36] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name37] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name38] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name39] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name40] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name41] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name42] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name43] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name44] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name45] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name46] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name47] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name48] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name49] = 'x' THEN 1 ELSE 0 END +
CASE WHEN [Name50] = 'x' THEN 1 ELSE 0 END
FROM [TableCustomers]
I generated this using an application called Nimble Text (http://nimbletext.com/) though you could use dynamic SQL along with the sys.columns view to generate this statement within SQL server, if the columns of the table change. Let me know if you would like an example of this...
You may try something like this:
select len(name00 + name01 + .. + name40) - len(replace(name00 + name01 + .. + name40, 'x', ''))
from yourTable;

How to count non-null/non-blank values in SQL

I have data like the following:
And what I want is to count the PONo, PartNo, and TrinityID fields with a value in them, and output data like this:
How can I do this counting in SQL?
select
Job_number, Item_code,
case when RTRIM(PONo) = '' or PONo is null then 0 else 1 end +
case when RTRIM(PartNo) = '' or PartNo is null then 0 else 1 end +
case when RTRIM(TrinityID) = '' or TrinityID is null then 0 else 1 end
as [Count]
from YourTable
Try this:
select Job_Number = t.Job_Number ,
Item_Code = t.Item_Code ,
"Count" = sum( case ltrim(rtrim(coalesce( PONo , '' ))) when '' then 0 else 1 end
+ case ltrim(rtrim(coalesce( PartNo , '' ))) when '' then 0 else 1 end
+ case ltrim(rtrim(coalesce( TrinityID , '' ))) when '' then 0 else 1 end
)
from dbo.my_table t
group by t.Job_Number , t.Item_Code
If you want to exclude data where all the tested fields are null or empty, add a having clause:
having sum( case ltrim(rtrim(coalesce( PONo , '' ))) when '' then 0 else 1 end
+ case ltrim(rtrim(coalesce( PartNo , '' ))) when '' then 0 else 1 end
+ case ltrim(rtrim(coalesce( TrinityID , '' ))) when '' then 0 else 1 end
) > 0
Easy!