SQL批量更新具有树形结构表Path字段

如上图所示，需要更新该表中Path字段，如ID=14的Path值：-1,ID=17的Path值：-1.14,ID=20的Path值：-1.14.18.19

步骤1、创建函数

Create FUNCTION  [dbo].[F_Org]
(
@id int
)
RETURNS TABLE
AS
RETURN
(
with testTable
as(
select UpperID from Core_DeptInfo
where ID=@id union all
select Core_DeptInfo.UpperID from Core_DeptInfo,testTable
where Core_DeptInfo.ID=testTable .UpperID)
 select UpperID  from testTable
)

步骤2、循环执行SQL

declare @minId int
declare @maxId int
declare @result nvarchar(50)
declare @count int
select  @minId = MIN(id) from Core_DeptInfo
select  @maxId = MAX(id) from Core_DeptInfo

WHILE @maxId >=@minId
BEGIN
    select @count = COUNT(1) from Core_DeptInfo where  ID=@maxId;
    if @count=1
    begin
        select @result = (select  CONVERT(nvarchar(50),UpperID) +‘.‘  from dbo.F_Org(@maxId) order by UpperID    for xml path(‘‘)  )
        set @result = LEFT(@result,LEN(@result)-1)
        update Core_DeptInfoExtend set Path=@result where ID=@maxId
    end
    SET @maxId = @maxId -1
END 

SQL批量更新具有树形结构表Path字段