SQL Server：计算SQL查询中的顺序

我在SQL Server 2008R2中具有以下四个表：

DECLARE @ParentGroup TABLE (ParentGroup_ID INT, ParentGroup_Name VARCHAR(100));
DECLARE @ChildGroup TABLE (ChildGroup_id INT, ChildGroup_name VARCHAR(100), ParentGroup_id INT);
DECLARE @Entity TABLE ([Entity_id] INT, [Entity_name] VARCHAR(100));
DECLARE @ChildGroupEntity TABLE (ChildGroupEntity_id INT, ChildGroup_id INT, [Entity_ID] INT);
INSERT INTO @parentGroup VALUES (1, 'England'), (2, 'USA');
INSERT INTO @ChildGroup VALUES (10, 'Sussex', 1), (11, 'Essex', 1), (12, 'Middlesex', 1);
INSERT INTO @entity VALUES (100, 'Entity0'),(101, 'Entity1'),(102, 'Entity2'),(103, 'Entity3'),(104, 'Entity4'),(105, 'Entity5'),(106, 'Entity6');
INSERT INTO @ChildGroupEntity VALUES (1000, 10, 100), (1001, 10, 101), (1002, 10, 102), (1003, 11, 103), (1004, 11, 104), (1005, 12, 100), (1006, 12, 105), (1007, 12, 106);
/*
SELECT * FROM @parentGroup
SELECT * FROM @ChildGroup
SELECT * FROm @entity
SELECT * FROM @ChildGroupEntity
*/

表之间的关系如下：

SELECT ParentGroup_Name, ChildGroup_name, [Entity_name],  0 [ChildGroupSequence], 0 [EntitySequence]
FROM @ChildGroupEntity cge
INNER JOIN @ChildGroup cg ON cg.ChildGroup_id=cge.ChildGroup_id
INNER JOIN @parentGroup pg ON pg.parentGroup_id=cg.parentGroup_id
INNER JOIN @entity e ON e.[entity_id]=cge.[Entity_ID]
ORDER BY ParentGroup_Name, ChildGroup_name, [Entity_name]

上面查询的输出是：

-------------------------------------------------------------------------------
ParentGroup_Name|ChildGroup_name|Entity_name|ChildGroupSequence|EntitySequence|
-------------------------------------------------------------------------------
England         |Essex          |Entity3    |0                 |0             |
England         |Essex          |Entity4    |0                 |0             |
England         |Middlesex      |Entity0    |0                 |0             |
England         |Middlesex      |Entity5    |0                 |0             |
England         |Middlesex      |Entity6    |0                 |0             |
England         |Sussex         |Entity0    |0                 |0             |
England         |Sussex         |Entity1    |0                 |0             |
England         |Sussex         |Entity2    |0                 |0             |
-------------------------------------------------------------------------------

现在，我想找出父组1的子组和与这些子组相关联的所有实体。此外，我想按以下逻辑计算[ChildGroupSequence]，[EntitySequence]：

1. ChildGroupSequence列应代表父组中子组的序列，从1000开始并递增100。即，第一个子组为1000，第二个子组为1100。
2. EntitySequence列应代表子组中的实体序列，从100开始并以一位数字递增，并为每个子组重置。也就是说，子组1中的第一个实体从100开始，子组2中的第一个实体也从100开始。

因此，输出应采用以下格式：

-------------------------------------------------------------------------------
ParentGroup_Name|ChildGroup_name|Entity_name|ChildGroupSequence|EntitySequence|
-------------------------------------------------------------------------------
England         |Essex          |Entity3    |1000              |100           |
England         |Essex          |Entity4    |1000              |101           |
England         |Middlesex      |Entity0    |1100              |100           |
England         |Middlesex      |Entity5    |1100              |101           |
England         |Middlesex      |Entity6    |1100              |102           |
England         |Sussex         |Entity0    |1200              |100           |
England         |Sussex         |Entity1    |1200              |101           |
England         |Sussex         |Entity2    |1200              |102           |
-------------------------------------------------------------------------------

我可以通过将值读取到应用程序层（.Net程序）中来轻松实现此目的，但是希望通过尝试一些类似的小事情来学习SQL Server。有人可以帮我编写此SQL查询吗？

任何帮助将非常感激。提前致谢。

编辑：我的样本数据似乎没有正确反映第一个规则，该规则指出ChildGroupSequence应该增加100，样本输出增加1。第二个查询反映出增加100。@jpw：非常感谢指出这一点。