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 REINDEXDBCC INDEXDEFRAG--收缩数据和日志DBCC SHRINKDBDBCC SHRINKFILE
3、压缩数据库
dbcc shrinkdatabase(dbname)
4、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
5、检查备份集
RESTORE VERIFYONLY from disk='E:dvbbs.bak'
6、修复数据库
ALTER DATABASE [dvbbs] SET SINGLE_USERGODBCC CHECKDB('dvbbs',repair_allow_data_loss) WITH TABLOCKGOALTER DATABASE [dvbbs] SET MULTI_USERGO
7、日志清除
SET NOCOUNT ONDECLARE @LogicalFileName sysname,@MaxMinutes INT,@NewSize INT
USE tablename -- 要操作的数据库名SELECT @LogicalFileName = 'tablename_log', -- 日志文件名@MaxMinutes = 10, -- Limit on time allowed to wrap log.@NewSize = 1 -- 你想设定的日志文件的大小(M)
Setup / initializeDECLARE @OriginalSize intSELECT @OriginalSize = size FROM sysfilesWHERE name = @LogicalFileNameSELECT 'Original Size of ' + db_name() + ' LOG is ' + CONVERT(VARCHAR(30),@OriginalSize) + ' 8K pages or ' + CONVERT(VARCHAR(30),(@OriginalSize*8/1024)) + 'MB'FROM sysfilesWHERE name = @LogicalFileNameCREATE TABLE DummyTrans(DummyColumn char (8000) not null)
DECLARE @Counter INT,@StartTime DATETIME,@TruncLog VARCHAR(255)SELECT @StartTime = GETDATE(),@TruncLog = 'BACKUP LOG ' + db_name() + ' WITH TRUNCATE_ONLY'
DBCC SHRINKFILE (@LogicalFileName, @NewSize)EXEC (@TruncLog)-- Wrap the log if necessary.WHILE @MaxMinutes > DATEDIFF (mi, @StartTime, GETDATE()) -- time has not expiredAND @OriginalSize = (SELECT size FROM sysfiles WHERE name = @LogicalFileName) AND (@OriginalSize * 8 /1024) > @NewSize BEGIN -- Outer loop.SELECT @Counter = 0WHILE ((@Counter < @OriginalSize / 16) AND (@Counter < 50000))BEGIN -- updateINSERT DummyTrans VALUES ('Fill Log') DELETE DummyTransSELECT @Counter = @Counter + 1ENDEXEC (@TruncLog) ENDSELECT 'Final Size of ' + db_name() + ' LOG is ' +CONVERT(VARCHAR(30),size) + ' 8K pages or ' + CONVERT(VARCHAR(30),(size*8/1024)) + 'MB'FROM sysfiles WHERE name = @LogicalFileNameDROP TABLE DummyTransSET NOCOUNT OFF
8、说明：更改某个表
exec sp_changeobjectowner 'tablename','dbo'
9、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 sysobjectswhere user_name(uid)=@OldOwnerorder by name
OPEN curObjectFETCH NEXT FROM curObject INTO @Name, @OwnerWHILE(@@FETCH_STATUS=0)BEGIN if @Owner=@OldOwner beginset @OwnerName = @OldOwner + '.' + rtrim(@Name)exec sp_changeobjectowner @OwnerName, @NewOwnerend-- select @name,@NewOwner,@OldOwner
FETCH NEXT FROM curObject INTO @Name, @OwnerEND
close curObjectdeallocate curObjectGO
10、SQL SERVER中直接循环写入数据declare @i intset @i=1while @i<30begininsert into test (userid) values(@i)set @i=@i+1end
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
数据开发-经典
1.按姓氏笔画排序:Select * From TableName Order By CustomerName Collate Chinese_PRC_Stroke_ci_as //从少到多
2.数据库加密:
select encrypt('原始密码')select pwdencrypt('原始密码')select pwdcompare('原始密码','加密后密码') = 1--相同；否则不相同 encrypt('原始密码')select pwdencrypt('原始密码')select pwdcompare('原始密码','加密后密码') = 1--相同；否则不相同
3.取回表中字段:
declare @list varchar(1000),@sql nvarchar(1000) select @list=@list+','+b.name from sysobjects a,syscolumns b where a.id=b.id and a.name='表A'set @sql='select '+right(@list,len(@list)-1)+' from 表A' exec (@sql)
4.查看硬盘分区:
EXEC master..xp_fixeddrives
5.比较A,B表是否相等:
if (select checksum_agg(binary_checksum(*)) from A)=(select checksum_agg(binary_checksum(*)) from B)print '相等'elseprint '不相等'
推荐阅读
- 你能用到的pyhon库都在这里了，值得收藏
- 推荐 10 个不错的网络监视工具，值得收藏
- 6个好用的网络监视工具，值得收藏
- 为什么我建议你买“便宜”的衣服？
- 红枣枸杞菊花茶,枸杞建议搭配红茶红枣菊花起泡
- 生晒小青柑,手把手教您生晒小青柑DIY方法,干货请收藏
- 国企|国有企业建立职业经理人制度有关建议及思考
- 每天喝茶时间表,值得收藏的喝茶时间表
- 普洱茶饼价格,普洱茶饼收藏的误区
- 普洱茶知识,,普洱茶知识