使用SqlServer2008

1.一个简单的函数，去掉NEWID()中的横线，生成32位的UUID

USE [incubator]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

CREATE FUNCTION [dbo].[fun_getid32](@newid varchar(36))
RETURNS VARCHAR(32)
AS
BEGIN
	DECLARE @id VARCHAR(32);

	select @id=SUBSTRING(@newid,1,8)+SUBSTRING(@newid,10,4)+SUBSTRING(@newid,15,4)+ SUBSTRING(@newid,20,4)+SUBSTRING(@newid,25,12)

	RETURN @id

END

--调用
select dbo.fun_getid32(cast(NEWID()as varchar(36)))

2.SqlServer2008，插入注释

--表注释
if exists (select * from ::fn_listextendedproperty('MS_Description', 'schema', 'dbo', 'table', 'SYS_ACTION', default, default))
BEGIN
    exec sys.sp_dropextendedproperty 'MS_Description', 'schema', 'dbo', 'table', 'SYS_ACTION'
END
exec sys.sp_addextendedproperty 'MS_Description', '权限表', 'schema', 'dbo', 'table', 'SYS_ACTION'
go

--字段注释
if exists (select * from ::fn_listextendedproperty('MS_Description', 'schema', 'dbo', 'table', 'SYS_ACTION', 'column', 'id'))
BEGIN
    exec sys.sp_dropextendedproperty 'MS_Description', 'schema', 'dbo', 'table', 'SYS_ACTION', 'column', 'id'
END
exec sys.sp_addextendedproperty 'MS_Description', '权限ID', 'schema', 'dbo', 'table', 'SYS_ACTION', 'column', 'id'
go

3.JDBC

jdbc.driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
jdbc.url=jdbc:sqlserver://127.0.0.1:1433;DatabaseName=database
jdbc.username=sa
jdbc.password=sa

#SqlServer
jdbc.driver=net.sourceforge.jtds.jdbc.Driver
jdbc.url=jdbc:jtds:sqlserver://localhost:1433/incubator;tds=8.0;lastupdatecount=true
jdbc.username=用户名
jdbc.password=密码

4.修改表后不能保存的问题

在sql server 2008的菜单栏“工具”下选择“选项”，在弹出对话框的左侧列表中有一个“设计器”，选择后，取消右侧“阻止保存要求重新创建表的更改”复选框的勾选，点击确认。

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5.查询所有表、字段、类型、注释等

--数据库中所有表  
select * from sys.tables t   
  
--数据库中所有列  
select * from sys.columns   
  
--数据库中所有数据类型  
select * from sys.types  
  
--数据库中所有注释  
select * from sys.extended_properties where major_id='2121058592'  
  
--查询所有表的表名和注释  
select  
t.name,  
case when p.value is null then ''  
else p.value  
end as value  
from sys.tables t  
left join sys.extended_properties p  
on(t.object_id=p.major_id and p.minor_id=0)

--查询某张表中所有列名、数据类型、长度、是否为空和注释     
select  
    c.name as columnName,   
    v.name as typeName,   
    c.max_length as length,   
    c.is_nullable as isNull,   
    p.value as comment   
from sys.tables t,   
    sys.columns c,   
    sys.types v,   
    sys.extended_properties p   
where t.object_id=c.object_id   
and c.system_type_id=v.system_type_id   
and c.column_id=p.minor_id
and t.object_id=p.major_id
and t.name='sys_user'
order by c.column_id 
 
--构造数据
select
	'Map<String,Object> '+c.name+'Map=new HashMap<String,Object>();'+
	c.name+'Map.put("columnName","'+c.name+'");'+
	c.name+'Map.put("typeName","'+v.name+'");'+
	c.name+'Map.put("length","'+cast(c.max_length as varchar(10))+'");'+
	c.name+'Map.put("isNull","'+cast(c.is_nullable as varchar(1))+'");'+
	c.name+'Map.put("comment","'+cast(p.value as varchar(100))+'");'+
	'list.add('+c.name+'Map);' as f
from sys.tables t,
	sys.columns c,
	sys.types v,
	sys.extended_properties p
where t.object_id=c.object_id
and c.system_type_id=v.system_type_id
and c.column_id=p.minor_id
and t.object_id=p.major_id
and t.name='sys_user'
order by c.column_id

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