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      //×°ÔØmysql-jdbcÇý¶¯
       Class.forName("com.mysql.jdbc.Driver").newInstance();
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      Connection sqlCon = DriverManager.getConnection( "jdbc:mysql://localhost:3306/javatest?user=root&password=admin&useUnicode=true&characterEncoding=utf-8 " );
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create database testdb; /* ´´½¨Êý¾Ý¿â */
use testdb; /* ´ò¿ªÊý¾Ý¿â */
/*grant ÆÕͨÊý¾ÝÓû§£¬²éѯ¡¢²åÈë¡¢¸üС¢É¾³ý Êý¾Ý¿âÖÐËùÓбíÊý¾ÝµÄȨÀû*/
grant select,insert,update,delete on testdb.* to common_user@'%';
grant select,insert,update,delete on testdb.* to common_user@'localhost'; ......

mysql×Ó²éѯ exists,not exists


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SELECT
d.Device_ID,d.Device_Name,a.App_ID,a.App_Name
               from
T_ ......

MySQL²é¿´ºÍµ¼Èëµ¼³öÃüÁî

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   show databases;
   ¸Õ¿ªÊ¼Ê±²ÅÁ½¸öÊý¾Ý¿â£ºmysqlºÍtest¡£mysql¿âºÜÖØÒªËüÀïÃæÓÐMYSQLµÄϵͳÐÅÏ¢£¬ÎÒÃǸÄÃÜÂëºÍÐÂÔöÓû§£¬Êµ¼ÊÉϾÍÊÇÓÃÕâ¸ö¿â½øÐвÙ×÷¡£
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   use mysql£» //´ò¿ª¿â
   show tables;
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select

*

from
core_vender_info
order

by

convert
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apache mysql php°²×°

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     yum install httpd-devel
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