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String sql= "select * from users where username=? and password=?;
PreparedStatement preState = conn.prepareStatement(sql);
preState.setString(1, userName);
preState.setString(2, password);
ResultSet rs = preState.executeQuery();
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sudo apt-get install sun-java6-jre
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sudo apt-get install sun-java6-jdk
Ìáʾ£º°²×°¹ý³ÌÖÐÐèÒªÄã»Ø´ðÊÇ·ñͬÒâʹÓÃÐÒ飨ÖÕ¶ËÖкìÀ¶É«µÄÌáʾ½çÃæ£ ......
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1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE DATABASE database-name
2¡¢ËµÃ÷£ºÉ¾³ýÊý¾Ý¿â
drop database dbname
3¡¢ËµÃ÷£º±¸·Ýsql server
--- ´´½¨ ±¸·ÝÊý¾ÝµÄ device
USE master
EXEC sp_addumpdevice 'disk', 'testBack', 'c:\mssql7backup\MyNwind_1.dat'
--- ¿ªÊ¼ ±¸·Ý
BACKUP DATABASE pubs TO testBack
4¡¢Ëµ ......
/*
* Source URL: http://jonsion.javaeye.com/blog/511584
*/
1. »ñÈ¡ËùÓÐÊý¾Ý¿âÃû
1> SELECT name from master..sysdatabases;
2> go
2. »ñÈ¡ËùÓбíÃû
1> USE master
2> go
1> SELECT name from sysobjects WHERE type='U';
2> go
3. »ñÈ¡ËùÓÐ×Ö¶ÎÃû
1> SELECT name ......
sysobjects ±í
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ÁÐÃû Êý¾ÝÀàÐÍ ÃèÊö
name sysname ¶ÔÏóÃû¡£
Id int ¶ÔÏó±êʶºÅ¡£
xtype char(2) ¶ÔÏóÀàÐÍ¡£¿ÉÒÔÊÇÏÂÁжÔÏóÀàÐÍÖеÄÒ»ÖÖ£º
C = CHECK Ô¼Êø
D = ĬÈÏÖµ»ò DEFA ......