使用FK关系将Parent更改为其子表

Question

我已经使用Aasim Abdullah's存储过程动态生成用于删除子表的代码，基于具有特定过滤条件的父级。但我得到的输出不正确（查询1）。我想在查询2中提到输出。

- [Patient]是Parent表，[Case]是子表，[ChartInstanceCase]是grand child - 当我删除一个大子表时，它应首先链接到子表，然后是父

查询1

DELETE Top(100000) FROM [dbo].[ChartInstanceCase]
FROM [dbo].[Patient] 
INNER JOIN [dbo].[Case]              ON [Patient].[PatientID]        = [Case].[PatientID]
INNER JOIN [dbo].[ChartInstanceCase] ON [ChartInstanceCase].[CaseId] = [Case].[CaseID]
WHERE [Patient].PracticeID = '55';

查询2

DELETE Top(100000) [dbo].[ChartInstanceCase]
FROM  [dbo].[ChartInstanceCase] 
INNER JOIN [dbo].[Case]    ON [ChartInstanceCase].[CaseId] = [Case].[CaseID] 
INNER JOIN [dbo].[Patient] ON [Patient].[PatientID]        = [Case].[PatientID]
WHERE [Patient].PracticeID = '55';

请告诉我如何修改SP dbo.uspCascadeDelete以获取输出为查询2？