/*--数据处理--*//*-- 一个重要的函数,很多处理的地方都会用到 --*/
--自定义函数--获取编码累计
create function f_getmergid(@id int)
returns varchar(8000)
as
begin
declare @re varchar(8000),@pid int --为了数字排序正常,需要统一编码宽度
declare @idlen int,@idheader varchar(20)
select @idlen=max(len(id))
,@idheader=space(@idlen)
from tb --得到编码累计
set @re=right(@idheader+cast(@id as varchar),@idlen)
select @pid=pid from tb where id=@id
while @@rowcount>0
select @re=right(@idheader+cast(@pid as varchar),@idlen)+','+@re
,@pid=pid from tb where id=@pid
return(@re)
end
go
--自定义函数--获取编码累计
create function f_getmergid(@id int)
returns varchar(8000)
as
begin
declare @re varchar(8000),@pid int --为了数字排序正常,需要统一编码宽度
declare @idlen int,@idheader varchar(20)
select @idlen=max(len(id))
,@idheader=space(@idlen)
from tb --得到编码累计
set @re=right(@idheader+cast(@id as varchar),@idlen)
select @pid=pid from tb where id=@id
while @@rowcount>0
select @re=right(@idheader+cast(@pid as varchar),@idlen)+','+@re
,@pid=pid from tb where id=@pid
return(@re)
end
go
--分级显示--横向,先一级,后二级...
select * from tb order by pid--分级显示--纵向
select * from tb order by dbo.f_getmergid(id)
go/*--数据统计--*/
--分级统计,每个地区下的明细地区数
select *,
明细地区数=(select count(*) from tb where dbo.f_getmergid(id) like dbo.f_getmergid(a.id)+',%')
from tb a order by dbo.f_getmergid(id)go
/*--数据新增,修改
数据新增,修改(包括修改所属的类别)没有什么技巧
,只需要检查所属的上级是否存在就行了.这个可以简单的用下面的语句来解决:
if exists(select 1 from tb where id=@id) print '存在' else print '不存在'
--*//*--数据删除--*/
create proc p_delete
@id int, --要删除的id
@deletechild bit=0 --是否删除子 1.删除子,0.如果@id有子,则删除失败.
as
if @deletechild=1
delete from tb where dbo.f_getmergid(id) like dbo.f_getmergid(@id)+'%'
else
if exists(select 1 from tb where pid=@id)
goto lbErr
else
delete from tb where id=@id
returnlbErr:
RAISERROR ('该结点下有子结点,不能删除', 16, 1)
go--调用示例
--删除'美国'的数据
--exec p_delete 2 --不包含子,因为有美国下有子,所以删除会出错
exec p_delete 2,1 --包含子,将删除美国及所有数据
go
/*--数据完整性检查--*/
--自定义函数--检测某个编码出发,是否被循环引用
create function f_chkid(@id int)
returns bit --循环,返回1,否则返回0
as
begin
declare @re bit,@pid int
set @re=0 --检测
select @pid=pid from tb where id=@id
while @@rowcount>0
begin
if @pid=@id
begin
set @re=1
goto lbErr
end
select @pid=pid from tb where id=@pid
endlbErr:
return(@re)
end
go--显示表中的那些数据不符合规范
select * from tb a
where not exists(select 1 from tb where id=a.pid)
or dbo.f_chkid(id)=1
go/*--数据复制 如果表中包含自定义字段,需要修改存储过程
存在嵌套不超过32层的问题.
--*/--创建复制的存储过程--复制指定结点下的子结点到另一个结点下
create proc p_copy
@s_id int, --复制该项下的所有子项
@d_id int, --复制到此项下
@new_id int --新增加项的开始编号
as
declare @nid int,@oid int,@name varchar(20)
select id,name into #temp from tb where pid=@s_id and id<@new_id
while exists(select 1 from #temp)
begin
select @oid=id,@name=name from #temp
insert into tb values(@d_id,@name)
set @nid=@@identity
exec p_copy @oid,@nid,@new_id
delete from #temp where id=@oid
end
go--创建批量复制的存储过程--复制指定结点及其下面的所有子结点,并生成新结点
create proc p_copystr
@s_id varchar(8000) --要复制项的列表,用逗号分隔
as
declare @nid int,@oid int,@name varchar(20)
set @s_id=','+@s_id+','
select id,name into #temp from tb
where charindex(','+cast(id as varchar)+',', @s_id)>0
while exists(select 1 from #temp)
begin
select @oid=id,@name=name from #temp
insert into tb values(@oid,@name)
set @nid=@@identity
exec p_copy @oid,@nid,@nid
delete from #temp where id=@oid
end
go--测试
exec p_copystr '5,6'--显示处理结果
select * from tb order by dbo.f_getmergid(id)go--删除数据测试环境
drop table tb
drop function f_getmergid,f_chkid
drop proc p_delete,p_copystr,p_copy
--自定义函数--检测某个编码出发,是否被循环引用
create function f_chkid(@id int)
returns bit --循环,返回1,否则返回0
as
begin
declare @re bit,@pid int
set @re=0 --检测
select @pid=pid from tb where id=@id
while @@rowcount>0
begin
if @pid=@id
begin
set @re=1
goto lbErr
end
select @pid=pid from tb where id=@pid
endlbErr:
return(@re)
end
go--显示表中的那些数据不符合规范
select * from tb a
where not exists(select 1 from tb where id=a.pid)
or dbo.f_chkid(id)=1
go/*--数据复制 如果表中包含自定义字段,需要修改存储过程
存在嵌套不超过32层的问题.
--*/--创建复制的存储过程--复制指定结点下的子结点到另一个结点下
create proc p_copy
@s_id int, --复制该项下的所有子项
@d_id int, --复制到此项下
@new_id int --新增加项的开始编号
as
declare @nid int,@oid int,@name varchar(20)
select id,name into #temp from tb where pid=@s_id and id<@new_id
while exists(select 1 from #temp)
begin
select @oid=id,@name=name from #temp
insert into tb values(@d_id,@name)
set @nid=@@identity
exec p_copy @oid,@nid,@new_id
delete from #temp where id=@oid
end
go--创建批量复制的存储过程--复制指定结点及其下面的所有子结点,并生成新结点
create proc p_copystr
@s_id varchar(8000) --要复制项的列表,用逗号分隔
as
declare @nid int,@oid int,@name varchar(20)
set @s_id=','+@s_id+','
select id,name into #temp from tb
where charindex(','+cast(id as varchar)+',', @s_id)>0
while exists(select 1 from #temp)
begin
select @oid=id,@name=name from #temp
insert into tb values(@oid,@name)
set @nid=@@identity
exec p_copy @oid,@nid,@nid
delete from #temp where id=@oid
end
go--测试
exec p_copystr '5,6'--显示处理结果
select * from tb order by dbo.f_getmergid(id)go--删除数据测试环境
drop table tb
drop function f_getmergid,f_chkid
drop proc p_delete,p_copystr,p_copy
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/*-- 得到级别 --*/
create function f_getidlevel(@id int)
returns int
as
begin
declare @re int,@pid int
set @re=1
--得到级别(深度)
select @pid=pid from tb where id=@id
while @@rowcount>0
select @re=@re+1
,@pid=pid from tb where id=@pid
return(@re)
end
go--调用
select *,dbo.f_getidlevel(id) from tb
--不包含排序字段的情况
create function f_getchildid(@id int)
returns @re table(id int)
as
begin
insert into @re select id from tb where pid=@id
while @@rowcount>0
insert into @re select a.id
from tb a inner join @re b on a.pid=b.id
where a.id not in(select id from @re)
return
end
go--包含排序字段的情况
create function f_getchildidsort(@id int)
returns @re table(id int,sortid varchar(8000))
as
begin
--为了数字排序正常,需要统一编码宽度
declare @idlen int,@idheader varchar(20)
select @idlen=max(len(id))
,@idheader=space(@idlen)
from tb insert into @re select id,right(@idheader+cast(id as varchar),@idlen)
from tb where pid=@id
while @@rowcount>0
insert into @re select a.id,right(@idheader+cast(a.id as varchar),@idlen)+','+b.sortid
from tb a inner join @re b on a.pid=b.id
where a.id not in(select id from @re)
return
end
go--调用示例,显示1的所有子.
select a.* from tb a inner join dbo.f_getchildidsort(1) b on a.id=b.id order by b.sortid
--不包含排序字段的情况
create function f_getparentid(@id int)
returns @re table(id int)
as
begin
declare @pid int
select @pid=pid from tb where id=@id
while @pid<>0
begin
insert into @re values(@pid)
select @pid=pid from tb where id=@pid
end
return
end
go--包含排序字段的情况
create function f_getparentidsort(@id int)
returns @re table(id int,sortid varchar(8000))
as
begin
--为了数字排序正常,需要统一编码宽度
declare @idlen int,@idheader varchar(20)
select @idlen=max(len(id))
,@idheader=space(@idlen)
from tb declare @pid int,@sortid varchar(8000)
select @pid=pid,@sortid=right(@idheader+cast(pid as varchar),@idlen)
from tb where id=@id
while @pid<>0
begin
insert into @re values(@pid,@sortid)
select @pid=pid,@sortid=right(@idheader+cast(pid as varchar),@idlen)
from tb where id=@pid
end
return
end
go--调用示例,显示9的所有父
select a.* from tb a inner join dbo.f_getparentidsort(9) b on a.id=b.id order by b.sortid