1.如何删除表中的重复记录？(这里指记录的每个字段都要相同)
select distinct * into #temp from tab
delete tab
insert tab select * from #temp
drop table #temp
1.DISTINCT 是 SUM、AVG 和 COUNT 的可选关键字。如果使用 DISTINCT，那么在计算总和、平均值或计数之前，先消除重复的值。
如果使用 DISTINCT 关键字，表达式必须只包含列名。而不能包含算术表达式。
以下查询返回商务书籍的平均价格（不包括重复的值）：
USE pubs
SELECT AVG(DISTINCT price)
FROM titles
WHERE type = 'business'
2.DISTINCT 关键字可从 SELECT 语句的结果中除去重复的行,distinct 后面的字段可以是多个或*,是一个那就各军兵种那个字段来取不重复的,
如果是多个,那就是筛选所选的字短都相同的记录.
USE pubs
SELECT DISTINCT au_id--按照一个字段筛选
FROM titleauthor
USE pubs
SELECT DISTINCT au_id,au_name --按照两个字段筛选
FROM titleauthor
2.怎样返回数据库中用户表的表单名
select name from sysobjects where xtype='U'
select name from sysobjects where xtype = 'u' and status >=0
3.
http://community.csdn.net/Expert/topic/4191/4191899.xml?temp=.5814325
各位大大请帮个忙,
一个表中A字段是int型的自动编号,B字段是首先要获取A字段已有的自动编号数据再经过加入时间等后生成的数据,表如下
C,D(日期),E为其他数据
列名 A(自动递加) B(A字段数据+日期等) C D E
---------------------------------------------------
1 A+D . . .
2 A+D . . .
---- 建立测试环境：
create table table1(a int identity,b varchar(20),c datetime,d datetime,e int)
create proc proc1
@c datetime,
@d datetime,
@e int
as
declare @f int
insert table1 (c,d,e) values(@c,@d,@e)
select @f=@@identity
if @@error=0
begin
update table1 set b=convert(varchar,a)+convert(varchar(12),d,120) where a=@f
end
---执行存储过程
exec proc1 '2001-10-01','2001-10-20',45
select * from table1
4.事务问题
http://community.csdn.net/Expert/topic/4245/4245634.xml?temp=.663891
(1)try：
-------------------------------------------------------------------------
CREATE PROCEDURE sp_Order_UpdateOrderFormHeadByAffirm
@OrderFormHeadID int,
@AffirmPerson nvarchar(50)
AS
BEGIN TRANSACTION
DECLARE @OrderFormNo nvarchar(50), @FranchiserNo nvarchar(10), @TotalSum decimal(18,4)
--更新状态为确认
UPDATE
AD_U_HEAD_A_SSGL
SET
Tag = 1
WHERE
OrderFormHeadID = @OrderFormHeadID
IF (@@error <> 0)
BEGIN
ROLLBACK TRANSACTION
RETURN
END
------------------------------------------------------------------------------------------
--返回 订单管理（HEAD）的一些信息
SELECT
@OrderFormNo = OrderFormNo,
@FranchiserNo = FranchiserNo,
@TotalSum = TotalSum
FROM
AD_U_HEAD_A_SSGL
WHERE
OrderFormHeadID = @OrderFormHeadID
IF (@@error <> 0)
BEGIN
ROLLBACK TRANSACTION
RETURN
END
------------------------------------------------------------------------------------------
--更新 订单管理（DATA）
UPDATE
AD_U_DATA_A_SSGL
SET
Tag = 1,
AffirmPerson = @AffirmPerson,
AffirmDate = GETDATE()
WHERE
OrderFormNo = @OrderFormNo
IF (@@error <> 0)
BEGIN
ROLLBACK TRANSACTION
RETURN
END
------------------------------------------------------------------------------------------
--经销代理资信余额（MAIN）
EXEC sp_Order_UpdateCreditBalance @FranchiserNo, 0, 0, 0, @TotalSum, 0
IF (@@error <> 0)
BEGIN
ROLLBACK TRANSACTION
RETURN
END
------------------------------------------------------------------------------------------
--新增 订单确认日志（SLOG）
INSERT INTO
AD_U_SLOG_A_DDQR(OrderFormNo, GoodsNo, Quantity,
UnitPrice, ProductPackingNo,TotalQuantity, TotalSum, Rebate, FactSum)
SELECT
OrderFormNo, GoodsNo, Quantity, UnitPrice, ProductPackingNo,
TotalQuantity, TotalSum, Rebate, FactSum
FROM
AD_U_DATA_A_SSGL
WHERE
OrderFormNo = @OrderFormNo
IF (@@error <> 0)
BEGIN
ROLLBACK TRANSACTION
RETURN
END
COMMIT TRANSACTION
GO
(2)----------------------------------
CREATE PROCEDURE sp_Order_UpdateOrderFormHeadByAffirm
@OrderFormHeadID int,
@AffirmPerson nvarchar(50)
AS
SET XACT_ABORT ON
BEGIN TRANSACTION
......
(3)你说得没错 其实你那样用事务的画没什么作用，每个存储过程都是一个事务。如果用事务最好有出错的处理是否回滚之类的东西。但是要考虑好表之间的关联性，如果都是一些单独的表，可以分几个事务处理，如果是父子表还是要放在一个事务里面。保证其数据的准确
性。
4请给条如何找出重复记录的SQL语句
select id,name,parentDeptid,status as state,type,showindex,url,corpid = 1001
from zfj_dept
日期:
select convert(varchar(16),getDate(),120) 2005-11-18 10:20
select convert(varchar,datepart(minute,getdate())) 获得分钟且转换为字符型
内联结/外联结
--返回两个表中共有的所有记录
select *
from testTable as a
inner join TestTableChild as b on a.id = b.parentid
--返回(左表)TestTable所有记录
select *
from testTable as a
left outer join TestTableChild as b on a.id = b.parentid
--返回(右表)TestTableChild的所有记录
select *
from testTable as a
right outer join TestTableChild as b on a.id = b.parentid
--- 返回 两个表里共有的记录,且不重复
select a.id,a.name,b.name
from testTable as a
inner join TestTableChild as b on a.id = b.parentid
group by a.id,a.name,b.name
--返回(左表)TestTable所有记录
select a.id,a.name,b.name
from testTable as a
left outer join TestTableChild as b on a.id = b.parentid
group by a.id,a.name,b.name
--------
select a.id,a.subject,b.contentType,c.AuguryUp,c.AuguryDown,
case c.type when '1' then '爱情' when '2' then '财运' when '3' then '事业' end as type
from MMS_Content as a
left outer Join MMS_ContentChild as b on a.id = b.parentid
left outer join AuguryList as c on a.id = c.parentid
where a.dept = 6
group by a.id,a.subject,b.contentType,c.AuguryUp,c.augurydown,c.type
向一个表A中插入记录,并且插入的记录在A中不存在(通过一个字段来判断)
insert into trace_users (tracekey,muteSMS,CreateTime,traceuser,tracetime,traceSlot,traceduration)
select 'TRACE_TIMER',0,getdate(),mobileid,getdate(),'30','0'
from Epm_EmployeeList where corpid = 10001
and mobileid not in (select traceuser from trace_users )
and mobileid like '13%' and len(mobileid) = 11
下面的要好些(not exists)
insert
into
trace_users (tracekey,muteSMS,CreateTime,traceuser,tracetime,traceSlot,traceduration)
select
'
TRACE_TIMER
'
,
0
,
getdate
(),mobileid,
getdate
(),
'
30
'
,
'
0
'
from
Epm_EmployeeList
where
corpid
=
10001
and
not
exists
(
select
traceuser
from
trace_users )
and
mobileid
like
'
13%
'
and
len
(mobileid)
=
11
cast 和convert DateAdd和DateDiff
--
调度设置的时候更新人员状态
--
EPM_EmployeeList 里的active = 1
--
trace_Timer 里的active = 1
--
trace_users 里的traceduration 清0
--
执行例子:exec up_SetSchedule 1001,'1009,1019'
ALTER
proc
up_SetSchedule
--
create proc up_SetSchedule
@nCorpId
int
,
@vchEmployeeIds
varchar
(
8000
),
@TimeStart
DateTime
,
@TimeEnd
DateTime
as
declare
@sql
varchar
(
8000
),
@TraceSolt
int
SET
XACT_ABORT
ON
--
任何一部有问题是都会回滚事务
BEGIN
TRANSACTION
--
开始事务
update
EPM_EmployeeList
set
activeStatus
=
0
where
corpid
=
@nCorpId
and
activeStatus
!=
0
if
(
@vchEmployeeIds
!=
''
)
begin
set
@sql
=
'
update EPM_EmployeeList set activeStatus = 1 where corpid=
'
+
convert
(
varchar
(
10
),
@nCorpId
)
+
'
and id in (
'
+
@vchEmployeeIds
+
'
)
'
exec
(
@sql
)
--
更新Trace_timer
set
@sql
=
'
update trace_Timer set activeStatus = 1 where corpid=
'
+
convert
(
varchar
(
10
),
@nCorpId
)
+
'
and mobileid in (
'
set
@sql
=
@sql
+
'
select mobileid from EPM_EmployeeList where id in (
'
+
@vchEmployeeIds
+
'
))
'
exec
(
@sql
)
select
@TraceSolt
=
(
select
tracesolt
from
EPM_EnterpriseList
where
id
=
@nCorpId
) (
'
+@vchEmployeeIds+
'
))
'
set @sql =
'
update
trace_users
set
createTime
=
'''
+cast(@timeStart as varchar)+
''''
set @sql= @sql+
'
,traceTime
=
'''
+cast(DateAdd(minute,@TraceSolt,@timeStart) as varchar ) set @sql= @sql+
'''
,traceDuration
=
'''
+convert(varchar,datediff(minute,@timeStart,@timeEnd))+
'''
where
traceuser
in
(
'
set @sql= @sql+
'
select
mobileid
from
EPM_EmployeeList
where
id
in
(
'
+@vchEmployeeIds+
'
))
'
exec (@sql) end COMMIT TRANSACTION --提交事务 GO
--导出企业根据大类别。四个表就晕了。。。。。。。
--插入到临时表里
select distinct (a.id),a.corpname,a.corplinkman,a.phonenumber,a.createtime,a.address
,(select distinct d.name
from
dz_subinfoDefine as c,
dz_mainInfoDefine as d
where c.maintype = d.maintype
and c.subtype = b.infotype) as type
into #table2
from dz_corporation as a
left join dz_information as b on a.id = b.corpid
--插入到表里.需要两次是因为无法对类别(大类)进行排序
select case when type IS NULL then '未知类别' else type end as 大类别,corpname as 名称 ,corplinkman as 联系人,phonenumber as 联系电话,address as 地址 ,createTime as 创建时间 into Table1 from #table2
order by type
----删除临时表
drop table #table2
好的方法????找不到........可能是数据库设计的不好.
通过另一个表来更新本表的记录.
begin transaction
update EPM_Employeelist set loginname =b.loginname,password= b.password
from zfj_users as b
where
EPM_Employeelist.userid = b.userid
and corpid = 10001
rollback transaction
在in子句中如何写变量的表达式问题
declare
@ids
varchar
(
8000
)
set
@ids
=
'
14501,14502,14503
'
select
*
from
table1
where
charindex
(
'
,
'
+
cast
(id
as
varchar
(
20
))
+
'
,
'
,
'
,
'
+
@ids
+
'
,
'
)
>
0
