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
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