sql合并数据(循环更新数据)
SQL数据的合并与 循环更新数据 在开发当中用的比较经常 前几天刚好有同学问到此类问题 在提到循环操作数据时 很多人都会想到递归 呵呵 这里就不说它了
递归帮助地址：ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.zh-CHS/udb9/html/4acf8a3e-6dcc-420c-9088-9c57b976113e.htm
但有此时候递归不适合我们的须求 在这就记录一下我个人的写法 如果还有好方法，望留言相互学习 例子如下：
例：根据某须求须要 在将任务分给几个不同的人去完成(称执行员) 而且执行员没有权限(或没有环境)直接操作数据 这时给执行人员每人一个简易的数库 等都执行完成后
同一合并母库中 如果库中的表存在主外键(或其它条件)时 对合并数据时会带来麻烦 我将在这共享我自己的SQL写法
例1 代码
declare
@count
int
,
@index
int
,
@userID
int
,
@newid
int
set
@index
=
1
set
@count
=
(
select
count
(UserID)
from
Users
where
UserID
>=
12064
)
set
@userID
=
12064
print
@count
while
(
@index
<=
@count
)
begin
begin
transaction
insert
into
母库.Users
(ID,UserName,
[
Password
]
,Gender,Email,RegisterDate,RegisterIP,LastOnline,LastIP,CookieExpireDate,SubjectQty,ReplyQty,
[
State
]
)
select
ID,UserName,
[
Password
]
,Gender,Email,RegisterDate,RegisterIP,LastOnline,LastIP,CookieExpireDate,SubjectQty,ReplyQty,
[
State
]
from
(
select
top
1
UserID,CommunityID,UserName,
[
Password
]
,Gender,Email,RegisterDate,RegisterIP,LastOnline,LastIP,CookieExpireDate,SubjectQty,ReplyQty,
[
State
]
from
子库.Users
where
UserID
>=
@userID
order
by
UserID
asc
)
as
usertable
set
@newid
=
@@identity
print
@newid
insert
into
母库.UserInfos
(UserID,Avatar,
[
Signature
]
,TaskID,BrandPreference,BrandDisgust,LastCookie)
select
@newid
as
UserID,Avatar,
[
Signature
]
,TaskID,BrandPreference,BrandDisgust,LastCookie
from
(
select
top
1
UserID,Avatar,
[
Signature
]
,TaskID,BrandPreference,BrandDisgust,LastCookie
from
子库.UserInfos
where
UserID
>=
@userID
order
by
UserID
asc
)
as
tableuser
set
@index
=
@index
+
1
set
@userID
=
(
select
top
1
userid
from
NM.dbo.CommunityUsers
where
UserID
>
@userID
order
by
UserID)
if
(
@@error
=
0
)
commit
transaction
else
rollback
transaction
end
GO
例二: 根据以上的方法也可用到数据的循环更新数据上 例如:TempTicketDetail表中的通一个订单按OriginalQty + VarientQty=当前的值，一个订单多条记录时第一笔是OriginalQty + VarientQty=当前的值,第二笔是第一笔的当前值+第二笔的VarientQty，以此类推
表结构如下
用以上方法的SQL如下：
代码
declare
@count
int
,
@orderid1
int
,
@index
int
,
@result
int
declare
@count_1
int
,
@id_1
int
,
@index_1
int
,
@result_1
int
,
@valueCount
int
set
@index
=
0
set
@count
=
(
select
count
(
distinct
orderid)
from
TempTicketDetail
where
orderid
>
-
1
)
set
@orderid1
=
(
select
distinct
top
1
orderid
from
TempTicketDetail
where
orderid
>
-
1
order
by
orderid)
while
(
@index
<
@count
)
begin
set
@index_1
=
0
set
@valueCount
=
(
select
count
(
[
id
]
)
from
TempTicketDetail
where
orderid
=
@orderid1
)
set
@id_1
=
(
select
top
1
[
id
]
from
TempTicketDetail
where
orderid
=
@orderid1
order
by
[
id
]
)
if
(
@valueCount
=
1
)
begin
set
@result
=
(
select
(OriginalQty
+
VarientQty)
as
hh
from
TempTicketDetail
where
[
Id
]
=
@id_1
)
update
TempTicketDetail
set
CurrentQty
=
@result
where
[
Id
]
=
@id_1
set
@id_1
=
(
select
top
1
[
id
]
from
TempTicketDetail
where
orderid
=
@orderid1
and
[
id
]
>
@id_1
order
by
[
id
]
)
end
else
begin
declare
@firstid
int
set
@firstid
=
1
while
(
@index_1
<
@valueCount
)
begin
if
(
@firstid
=
1
)
begin
set
@result
=
(
select
(OriginalQty
+
VarientQty)
as
hh
from
TempTicketDetail
where
[
Id
]
=
@id_1
)
update
TempTicketDetail
set
CurrentQty
=
@result
where
[
Id
]
=
@id_1
set
@id_1
=
(
select
top
1
[
id
]
from
TempTicketDetail
where
orderid
=
@orderid1
and
[
id
]
>
@id_1
order
by
[
id
]
)
end
else
begin
set
@result
=
@result
+
(
select
VarientQty
from
TempTicketDetail
where
[
Id
]
=
@id_1
)
update
TempTicketDetail
set
CurrentQty
=
@result
where
[
Id
]
=
@id_1
set
@id_1
=
(
select
top
1
[
id
]
from
TempTicketDetail
where
orderid
=
@orderid1
and
[
id
]
>
@id_1
order
by
[
id
]
)
end
set
@firstid
=
2
set
@index_1
=
@index_1
+
1
end
end
set
@orderid1
=
(
select
distinct
top
1
orderid
from
TempTicketDetail
where
orderid
>
@orderid1
and
orderid
>
-
1
order
by
orderid)
set
@index
=
@index
+
1
end