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HomeDatabaseMysql TutorialSQL Server的数据导入MySQL数据库方法简介(1)

第一种是安装mysql ODBC,利用sql server的导出功能,选择mysql数据源,进行数据的直接导出,这种方法很简便,但是针对实际应用有很多弊端,最主要体现就是数据类型问题,首先,sql server数据库中的ntext,image等数据类型的数据无法直接写入到mysql数据库中

第一种是安装mysql ODBC,利用sql server的导出功能,选择mysql数据源,进行数据的直接导出,这种方法很简便,但是针对实际应用有很多弊端,最主要体现就是数据类型问题,首先,sql server数据库中的ntext,image等数据类型的数据无法直接写入到mysql数据库中,据说只要稍加改动就可以,可惜偶这只菜鸟还没想到如何改动,其次,因为偶在mysql中的数据库设计中将时间都设成int型(保存的是时间戳),所以在数据导过来后,就会出现冲突,再次,这种方法生成的mysql数据表的字段类型都不很合适,所以此种方法我觉得不能提倡。

第二种是利用php或asp脚本来实现数据的导入功能,这种方法需要编写程序,但灵活性大,操作也不是那么困难,一切都尽在你的掌握之中,现简单介绍一下该方法。前提条件是你的mysql环境已经搭建好了,先建好目标数据库,再将所有的表结构用sql语句生成,现在万事具备,只缺数据了。

可以通过下面的php脚本来实现sql server中mydb数据库的user表中数据向mysql中mydb数据库导入:

 
$cnx = odbc_connect('web', 'admin', '123456');
    //'web'是sqlserver中mydb的数据源名,
    'admin'是访问mydb的用户名,'123456'是访问mydb的密码
$cur= odbc_exec( $cnx, 'select * from user' );
    //打开sql server中mydb数据库的user表
$num_row=0;
$conn=mysql_pconnect("localhost","root","123456");
    // 连接mysql
@mysql_select_db('mydb',$conn) or

die("无法连接到数据库,请与管理员联系!");
    //打开mysql的mydb数据库
while( odbc_fetch_row( $cur )) 
    //从sql server的mydb库中的user表逐条取出数据,如果对数据进行选择,
    可在前面的select语句中加上条件判断
{
$num_row++;
$field1 = odbc_result( $cur, 1 ); 
    // 这里的参数i(1,2,3..)指的是记录集中的第i个域,
    你可以有所选择地进行选取,fieldi得到对应域的值,然后你可以对fieldi进行操作
$field2 = odbc_result( $cur, 2 );
$field3 = odbc_result( $cur, 3 );
$field4 = odbc_result( $cur, 4 );
$field5 = odbc_result( $cur, 5 );
$field6 = odbc_result( $cur, 6 );
$field5 = timetoint($field5); //这里是对sql server中的datetime类型
    的字段进行相应转换处理,转换成我所需要的int型
$querystring = "insert into user
(id,name,username,password,recdate)
values('$field1','$field2','$field3','$field4','$field5')" ;

mysql_query($querystring,$conn);
}

function timetoint($str){
$arr1=split(" ",$str);
$datestr=$arr1[0];
$timestr=$arr1[1];
$arr_date=split("-",$datestr);
$arr_time=split(":",$timestr);
$year=$arr_date[0];
$month=$arr_date[1];
$day=$arr_date[2];
$hour=$arr_time[0];
$minute=$arr_time[1];
$second=$arr_time[2];
$time_int=mktime($hour,$minute,$second,$month,$day,$year);
return $time_int;
}
?>

将该段脚本存成sql.php,在服务器上执行,就可以将服务器上sql server中mydb数据库的user表中的数据导入到mysql中mydb数据库的user表中去。其他表的操作与此雷同,就不赘述了。

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