資料庫開發 精典

1.按姓氏筆畫排序:

select * from tablename order by customername collate

chinese_prc_stroke_ci_as

2.資料庫加密:

select encrypt('原始密碼')

select pwdencrypt('原始密碼')

select pwdcompare('原始密碼','加密後密碼') = 1--相同；否則不相同

encrypt('原始密碼')

select pwdencrypt('原始密碼')

select pwdcompare('原始密碼','加密後密碼') = 1--相同；否則不相同

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.檢視硬碟分割槽:

exec

master..xp_fixeddrives

5.比較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'

else

print '不相等'

6.殺掉所有的事件探察器程序:

declare hcforeach cursor

global

for select 'kill '+rtrim(spid) from master.dbo.sysprocesses

where program_name in('sql profiler',n'sql 事件探查器')

exec sp_msforeach_worker '?'

7.記錄搜尋:

開頭到n條記錄

select top n * from 表

-------------------------------

n到m條記錄(要有主索引id)

select top m-n * from 表 where id in (select top m id from 表) order

by id  desc

----------------------------------

n到結尾記錄

select top n * from 表 order by id desc

8.如何修改資料庫的名稱:

sp_renamedb 'old_name', 'new_name' 

9：獲取當前資料庫中的所有使用者表

select name from sysobjects where xtype='u' and status>=0

10：獲取某乙個表的所有字段

select name from syscolumns where id=object_id('表名')

select a.* from sysobjects a, syscomments b where a.id = b.id and b.text like '%表名%'

12：檢視當前資料庫中所有儲存過程

select name as 儲存過程名稱 from sysobjects where xtype='p'

13：查詢使用者建立的所有資料庫

select * from master..sysdatabases d where sid not in(select sid from master..syslogins where name='sa')

或者select dbid, name as db_name from master..sysdatabases where sid <> 0x01

14：查詢某乙個表的字段和資料型別

select column_name,data_type from information_schema.columns

where table_name = '表名'

[n].[標題]:

select * from tablename order by customername 

[n].[標題]: