ÁøÓÀ·¨³£ÓÃSQLÓï¾ä±¸Íü
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--½¨Êý¾Ý¿â
create database yongfa365_com
on
( name = yongfa365_comt,
filename = 'd:\yongfa365_com.mdf',
size = 4,
maxsize = 10,
filegrowth = 1
)
--ɾÊý¾Ý¿â
drop database yongfa365_com
--±¸·ÝÊý¾Ý¿â
backup database yongfa365_com to disk='d:\yongfa365_com.bak'
--ÅúÁ¿ÊÕËõËùÓÐÊý¾Ý¿â
declare cur cursor for select name from Master..SysDatabases where name not in ('master','model','msdb','Northwind','pubs')
declare @tb sysname
open cur
fetch next from cur into @tb
while @@fetch_status=0
begin
exec ('dump transaction ['+@tb+'] with no_log')
exec ('backup log ['+@tb+'] with no_log')
exec ('dbcc shrinkdatabase(['+@tb+'])')
fetch next from cur into @tb
end
close cur
deallocate cur
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--ɾ³ý±í
drop table movies
--ͨÓý¨±í½á¹¹
Create Table [dbo].[±íÃû] (
[Id] int primary key identity(1,1),--ID£¬Ö÷¼ü£¬×Ô¶¯ºÅ
[txtTitle] varchar(255),--±êÌâ
[txtContent] varchar(MAX),--ÄÚÈÝ
[AddTime] datetime Default (getdate()),--Ìύʱ¼ä
[ModiTime] datetime Default (getdate()),--ÐÞ¸Äʱ¼ä
[Hits] int Default (0),--µã»÷Êý
[Flags] int Default (0) ,
Ïà¹ØÎĵµ£º
character-set-server = GB2312
collation-server = latin1_general_ci
MySQL×Ö·û¼¯ GBK¡¢GB2312¡¢UTF8Çø±ð ½â¾ö MYSQLÖÐÎÄÂÒÂëÎÊÌâ ÊÕ²Ø
MySQLÖÐÉæ¼°µÄ¼¸¸ö×Ö·û¼¯
character-set-server/default-character-set£º·þÎñÆ÷×Ö·û¼¯£¬Ä¬ÈÏÇé¿öÏÂËù²ÉÓõġ£
character-set-database£ºÊý¾Ý¿â×Ö·û¼¯¡£
character-set-table£ºÊ ......
import java.sql.*;
/*
* JAVAÁ¬½ÓACCESS£¬SQL Server,MySQL,OracleÊý¾Ý¿â
*
* */
public class JDBC {
public static void main(String[] args)throws Exception {
Connection conn=null;
//====Á¬½ÓACCESSÊý¾Ý¿â ......
ÓÃÏÂÃæµÄÊÓͼ£º
SQL> desc user_col_comments;
Name Null? Type
------------------------------- -------- ----
TABLE_NAME &nbs ......
select * from student where name=?;
Èç¹û²»Óõ¥ÒýºÅÒýÆðÀ´£¬ pstmt.setString(1,"xx or 1=1");¼´sqlÓ¦¸Ã¾ÍÊÇselect * from student where name=xx or 1=1¾Í¿ÉÒÔÈ«²¿²é³ö¡£
Ç¿ÖƵ¥ÒýºÅÒýÆðÀ´£¬select * from student where name='xx or 1=1'¡£¾ÍÎÞЧÁË¡£
ÊýÖµÐ͵ÄûÓÐÒªÇóÓõ¥ÒýºÅÒýÆðÀ´£¬Ó¦¸ÃÊÇÓÉÓÚÓÐÒ»¸öת»»¹ý ......
SQL Server Filtered Indexes - What They Are, How to Use and Performance Advantages
Written By: Arshad Ali -- 7/2/2009 -
Problem
SQL Server 2008 introduces Filtered Indexes which is an index with a WHERE clause. Doesn’t it sound awesome especially for a table that has huge amount of data and ......