SQL Nested select grouped with several rows of results - sql

Question

Hope this makes sense..
I have the following database tabels.
I am trying to group a resultset together in an SQL statement.
This is my current SQL statements:
SELECT
Patient.ID,
Patient.Name,
AnimalType.Value as AnimalType,
Patient.Age,
Customer.Firstname,
Customer.Lastname
FROM Patient
INNER JOIN Customer ON Patient.Owner_FK = Customer.ID
INNER JOIN AnimalType ON Patient.Type_FK = AnimalType.ID
SELECT
Treatment.Treatment_Date,
TreatmentType.Type
FROM Treatment
INNER JOIN TreatmentItem ON Treatment.ID = TreatmentItem.Treatment_FK
INNER JOIN TreatmentType ON TreatmentItem.TreatmentType_FK = TreatmentType.ID
INNER JOIN Patient ON TreatmentItem.Patient_FK = Patient.ID
WHERE Patient.ID = 132
There are two issues with this,
I have a static ID, and the results are split.
This is result of the above SQL's
My Issue is that the last resultset, should be together with the corresponding "Animal (patient)".
But without duplicate data. I could get the data all in one go, but then i would have a lot of duplicate rows of data with only the TreatmentType being different..
So how do i make this work ?
I have searched to no avail, and have not been able to make a correct Group by, that would make it work.
Does it make any sense ?
Is it even possible ?
example of desired result:

Answer 1

I believe you can achieve what you want with a single query, CASE statements, and the ROW_NUMBER() function, but it would require conversions of all non-text columns.
Here is a rough stab at a potential solution (I did not build your DB, so I haven't verified that this exact SQL runs, but the overall concept works).
WITH CTE_PatientTreatments AS (
SELECT
-- Get the row number for each treatment for a given patient
ROW_NUMBER() OVER (PARTITION BY Patient.ID ORDER BY Treatment.ID) AS RowNum,
Patient.ID,
Patient.Name,
AnimalType.Value as AnimalType,
Patient.Age,
Customer.Firstname,
Customer.Lastname,
Treatment.Treatment_Date,
TreatmentType.Type
FROM Patient
INNER JOIN Customer ON Patient.Owner_FK = Customer.ID
INNER JOIN AnimalType ON Patient.Type_FK = AnimalType.ID
INNER JOIN TreatmentItem ON TreatmentItem.Patient_FK = Patient.ID
INNER JOIN Treatment ON Treatment.ID = TreatmentItem.Treatment_FK
INNER JOIN TreatmentType ON TreatmentItem.TreatmentType_FK = TreatmentType.ID
WHERE Patient.ID = 132
-- Ensure rows are sorted so that rows for the same patient are always together
ORDER BY Patient.ID, Treatment.ID
)
-- Only display patient information for the first row
SELECT -- Convert numeric columns to text so that the "ELSE ''" doesn't get coerced into a number (0)
CASE WHEN (RowNum > 1) THEN '' ELSE CAST(ID AS VARCHAR) END AS ID,
CASE WHEN (RowNum > 1) THEN '' ELSE Name END AS Name,
CASE WHEN (RowNum > 1) THEN '' ELSE AnimalType END AS AnimalType,
CASE WHEN (RowNum > 1) THEN '' ELSE CAST(Age AS VARCHAR) END AS Age,
CASE WHEN (RowNum > 1) THEN '' ELSE Firstname END AS Firstname,
CASE WHEN (RowNum > 1) THEN '' ELSE Lastname END AS Lastname,
Treatment_Date,
Type
FROM CTE_PatientTreatments