1、1=1,1=2的使用,在SQL语句组合时用的较多
“where 1=1” 是表示选择全部    “where 1=2”全部不选,
如:
if @strWhere !='' 
begin
set @strSQL = 'select count(*) as Total from [' + @tblName + '] where ' + @strWhere 
end
else 
begin
set @strSQL = 'select count(*) as Total from [' + @tblName + ']' 
end
 
我们可以直接写成
 
错误!未找到目录项。
set @strSQL = 'select count(*) as Total from [' + @tblName + '] where 1=1 安定 '+ @strWhere 2、收缩数据库
--重建索引
DBCC REINDEX
DBCC INDEXDEFRAG
--收缩数据和日志
DBCC SHRINKDB
DBCC SHRINKFILE
 
2、压缩数据库
dbcc shrinkdatabase(dbname)
 
 3、转移数据库给新用户以已存在用户权限
exec sp_change_users_login 'update_one','newname','oldname'
go
 
 4、检查备份集
RESTORE VERIFYONLY from disk='E:\dvbbs.bak'
 
 5、修复数据库
ALTER DATABASE [dvbbs] SET SINGLE_USER
GO
DBCC CHECKDB('dvbbs',repair_allow_data_loss) WITH TABLOCK
GO
ALTER DATABASE [dvbbs] SET MULTI_USER
GO
 
 
 
 6、说明:更改某个表
exec sp_changeobjectowner 'tablename','dbo'
 
7、存储更改全部表
CREATE PROCEDURE dbo.User_ChangeObjectOwnerBatch
@OldOwner as NVARCHAR(128),
@NewOwner as NVARCHAR(128)
AS
 
DECLARE @Name    as NVARCHAR(128)
DECLARE @Owner   as NVARCHAR(128)
DECLARE @OwnerName   as NVARCHAR(128)
 
DECLARE curObject CURSOR FOR 
select 'Name'    = name,
   'Owner'    = user_name(uid)
from sysobjects
where user_name(uid)=@OldOwner
order by name
 
OPEN   curObject
FETCH NEXT FROM curObject INTO @Name, @Owner
WHILE(@@FETCH_STATUS=0)
BEGIN     
if @Owner=@OldOwner 
begin
   set @OwnerName = @OldOwner + '.' + rtrim(@Name)
   exec sp_changeobjectowner @OwnerName, @NewOwner
end
-- select @name,@NewOwner,@OldOwner
 
FETCH NEXT FROM curObject INTO @Name, @Owner
END
 
close curObject
deallocate curObject
GO
 
 8、SQL SERVER中直接循环写入数据
declare @i int
set @i=1
while @i<30
begin
    insert into test (userid) values(@i)
    set @i=@i+1
end

案例:
有如下表,要求就裱中所有沒有及格的成績,在每次增長0.1的基礎上,使他們剛好及格:
 
    Name     score 
    Zhangshan   80 
    Lishi       59
    Wangwu      50
    Songquan    69
while((select min(score) from tb_table)<60)
begin
update tb_table set score =score*1.01
where score<60
if  (select min(score) from tb_table)>60
  break
 else
    continue
end