Group BY的复杂SQL查询

Question

I have 4 Tables ( Cattle , Farm , Vaccine , vReminder ) I want to select from Vaccine Reminder table all reminders to be shown as

( 2 ( Cows ) have ( Vaccine Name 1) from ( Farm Name 1) on this Date ) ( 3 ( Horses) have ( Vaccine Name 1) from ( Farm Name 1) on this Date ) ( 1 ( Cow) have ( Vaccine Name 5) from ( Farm Name 2) on this Date ) and so On

I wrote this Query But it is not Grouping the same Vaccine Type that are located for the same Farm if the cattle is of the same type :

My Query :

  SELECT 
  (Select v.vName from vaccine as v where v.vID= vr.[vID]),
  vr.[Type],
  vsD,
  COUNT(vr.[Type]),
  f.farmName
  FROM [QNFARM].[dbo].[vReminder] as vr  inner join
       [cattle] as c on c.RFID = vr.RFID inner join
       farm as f on f.farmID = c.fID    
  Group by
  vr.vID,
  vr.Type,
  vsD,
  vr.RFID,
  f.farmName

But as you See in the screen shot that it is Vname Pinkeye for to same breeds and same Dates and same Farm it does not Group Them .

Answer 1

The Problem that I was grouping also by RFID of the cattle that was preventing the group function to collect the Same vaccine id , so the correct query is :

  SELECT f.farmName,vr.[Type],
  (Select v.vName from vaccine as v where v.vID= vr.[vID]) as vName,vr.vsD
  ,COUNT(*) as Num
  FROM [QNFARM].[dbo].[vReminder] as vr inner join  [cattle] as c on c.RFID=vr.RFID  inner join farm as f on f.farmID=c.fID    Group by f.farmName,vr.Type,vr.vID,vr.vsD

I just remove the RFID from the group by statement and the result now

Answer 2

Don't use a subquery to get the vaccine name. Just use joins:

SELECT v.vName, vr.[Type], vsD, COUNT(*), f.farmName
FROM [QNFARM].[dbo].[vReminder] vr INNER JOIN
     [cattle] c 
     ON c.RFID = vr.RFID  INNER JOIN 
     farm f 
     ON f.farmID = c.fID INNER JOIN
     vaccine v
     ON v.vid = vr.vid
GROUP BY v.vname, vr.Type, vsD, f.farmName;