【SQL数据库开发中的一些经典代码】数据库开发

1.按姓氏笔画排序:

Select * From TableName Order By CustomerName Collate Chinese_PRC_Stroke_ci_as

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"

else

print "不相等"

6.杀掉所有的事件探察器进程:

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.记录搜索:

开头到N条记录

Select Top N * From 表

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

N到M条记录(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到结尾记录

Select Top N * From 表 Order by ID Desc

8.如何修改数据库的名称:

sp_renamedb "old_name", "new_name"

9：获取当前数据库中的所有用户表

select Name from sysobjects where xtype="u" and status>=0

10：获取某一个表的所有字段

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

11：查看与某一个表相关的视图、存储过程、函数

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

12：查看当前数据库中所有存储过程

select name as 存储过程名称 from sysobjects where xtype="P"

13：查询用户创建的所有数据库

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：查询某一个表的字段和数据类型

select column_name,data_type from information_schema.columns

where table_name = "表名"

[n].[标题]:

Select * From TableName Order By CustomerName

[n].[标题]:

Select * From TableName Order By CustomerName