MS-SQL數據庫開發常用匯總
2024-07-21 02:12:10
供稿：網友
1.按姓氏筆畫排序:
select * from tablename order by customername collate chinese_prc_stroke_ci_as
2.數據庫加密:
select encrypt('原始密碼')
select pwdencrypt('原始密碼')
select pwdcompare('原始密碼','加密后密碼') = 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','加密后密碼') = 1--相同；否則不相同
3.取回表中字段:
declare @list varchar(1000),@sql nvarchar(1000)
select @[email protected]+','+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.查看硬盤分區:
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進程:
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.記錄搜索:
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.如何修改數據庫的名稱:
sp_renamedb 'old_name', 'new_name'
9：獲取當前數據庫中的所有用戶表
select name from sysobjects where xtype='u' and status>=0
10：獲取某一個表的所有字段
select name from syscolumns where id=object_id('表名')
11：查看與某一個表相關的視圖、存儲過程、函數
select a.* from sysobjects a, syscomments b where a.id = b.id and b.text like '%表名%'
12：查看當前數據庫中所有存儲過程
select name as 存儲過程名稱 from sysobjects where xtype='p'
13：查詢用戶創建的所有數據庫
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：查詢某一個表的字段和數據類型
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]:
select * from tablename order by customername
