https://www.cnblogs.com/chuncn/archive/2009/02/20/1395165.html

SQL Server 2005 的分區表（partition table）是復雜的，特別是對於初學者來說。不管怎樣，我們還是掌握了分區函數（partition function），分區方案（partition scheme），最后終於創建了一個分區表出來。但之后呢，或許你想查看分區表的各個分區分區列的取值范圍（這個分區的理論最小值和最大值），雖然可以通過分區函數中定義的邊界值（boundary value）來推算出來分區表每個分區（partition）的取值范圍，但是事情並不是很簡單，你需要一系列繁瑣的步驟來實現：首先要找出這個分區表的分區函數；然后確定該分區函數定義的邊界值屬於 left 或者 right； 最后在腦子里使勁思索幾下終於確定了分區列取值范圍（partition range）。幸運的是，有了下面的這個存儲過程，你的大腦就可以獲得解放了。

if exists (select 1 from sys.procedures where name = 'sp_show_partition_range')
   drop procedure dbo.sp_show_partition_range
go

--------------------------------------------------------------------------------
-- author : p.c.w.l
-- source : www.sqlstudy.com
-- create : 2008-01-01
-- descr  : view partition range by 'partition table' or 'partition function'
--------------------------------------------------------------------------------

create procedure dbo.sp_show_partition_range
(
   @partition_table    nvarchar(255) = null
  ,@partition_function nvarchar(255) = null
)
as
begin
   set nocount on

   declare @function_id int
       set @function_id = null

   -- get @function_id base on @partition_table
   if len(@partition_table) > 0 begin
      select @function_id = s.function_id
        from sys.indexes i
                inner join sys.partition_schemes s
          on i.data_space_id = s.data_space_id
       where
　　　　　　-- i.index_id < 2 and 
　　　　　　i.object_id = object_id(@partition_table)
         
      if @function_id is null
         return 1         
   end

   -- get @function_id base on @partition_function
   if len(@partition_function) > 0 begin
      select @function_id = function_id
        from sys.partition_functions
       where name = @partition_function
       
      if @function_id is null
         return 1        
    end
   

   -- get partition range
   select partition_function = f.name
         ,t.partition
         ,t.minval
         ,value = case when f.boundary_value_on_right=1 then '<= val <' else '< val <=' end
         ,t.maxval
     from (
           select h.function_id
                 ,partition = h.boundary_id
                 ,minval    = l.value
                 ,maxval    = h.value
             from sys.partition_range_values h
                     left join sys.partition_range_values l
               on h.function_id = l.function_id and h.boundary_id = l.boundary_id + 1

           union all

           select function_id
                 ,partition = max(boundary_id) + 1
                 ,minval    = max(value)
                 ,maxval    = null
             from sys.partition_range_values
            group by function_id
          ) t
              inner join sys.partition_functions f
         on t.function_id = f.function_id
      where f.function_id = @function_id
         or @function_id is null
      order by 1, 2
end
go