MySQL ÃüÁîÐÐ ÖÐÎÄÂÒÂë
Óöµ½Ò»¸öÎÊÌâÊÇÔÚMySQLÃüÁîÐвåÈëÖÐÎÄÊý¾Ý»òÕß²éѯÖÐÎÄÊý¾Ýʱ³öÏÖÂÒÂ룬»òÕßÏÔʾ²»¶Ô¡£
ÔÚÃüÁîÐÐÊäÈë:show variables like ‘character_set_%’;
²é¿´µ±Ç°ÅäÖõıàÂ룻
ÔÚÃüÁîÐÐÊäÈë :set names utf8;
ÔòµÈͬÓÚ
set character_set_client=utf8;
set character_set_results=utf8;
set character_set_connection=utf8;
ÕâÈýÌõÃüÁî
ÔÚÃüÁîÐвåÈëÊý¾Ý֮ǰ
Ö´ÐÐÃüÁîset names gbk;»òÕßset names gb2312;
ÔÙ²åÈë
²éѯÊý¾Ý֮ǰ
Ö´ÐÐÃüÁîset names gbk;»òÕßset names gb2312;
ÍêÁËÖ®ºóÔÙset names utf8;
ÕâÑù¾ÍÄÜÕý³£²åÈëºÍ²éѯÖÐÎIJ¢ÇÒ±£³ÖÊý¾Ý¿â±àÂëΪutf8
Ïà¹ØÎĵµ£º
Ò»¡¢Á¬½ÓMYSQL¡£
¸ñʽ£º mysql -hÖ÷»úµØÖ· -uÓû§Ãû £pÓû§ÃÜÂë
1¡¢Àý1£ºÁ¬½Óµ½±¾»úÉϵÄMYSQL¡£
Ê×ÏÈÔÚ´ò¿ªDOS´°¿Ú£¬È»ºó½øÈëĿ¼ mysqlbin£¬ÔÙ¼üÈëÃüÁîmysql -uroot -p£¬»Ø³µºóÌáʾÄãÊäÃÜÂ룬Èç¹û¸Õ°²×°ºÃMYSQL£¬³¬¼¶Óû§rootÊÇûÓÐÃÜÂëµÄ£¬¹ÊÖ±½Ó»Ø³µ¼´¿É½øÈëµ½MYSQLÖÐÁË£¬MYSQLµÄÌáʾ·ûÊÇ£ºmysql>
2¡¢Àý2£ºÁ ......
½â¾ö·½·¨£º
1¡£ ¸Ä±í·¨¡£
¿ÉÄÜÊÇÄãµÄÕʺŲ»ÔÊÐí´ÓÔ¶³ÌµÇ½£¬Ö»ÄÜÔÚlocalhost¡£Õâ¸öʱºòÖ»ÒªÔÚlocalhostµÄÄÇ̨µçÄÔ£¬µÇÈëmysqlºó£¬¸ü¸Ä "mysql" Êý¾Ý¿âÀïµÄ "user" ±íÀïµÄ "host" Ï´Ó"localhost"¸Ä³Æ"%"
mysql -u root -p vmware mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mys ......
1.¼ÓÔØmysqlÇý¶¯°üProperties->java Build Path->Libraries->Add External JARs...
2.Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/Êý¾Ý¿âÃû?user=root&password=ÃÜÂë"); ......
MySQL²éѯ±íÄÚÖØ¸´¼Ç¼
²éѯ¼°É¾³ýÖØ¸´¼Ç¼µÄ·½·¨
(Ò»)
1¡¢²éÕÒ±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨peopleId£©À´ÅжÏ
select * from people
where peopleId in (select peopleId from people group by peopleId having count(peopleId) > 1)
2¡¢É¾³ý±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×Ö¶Î ......
ÒÔǰÓùßÁËMSSQL£¬VC++ÓÐÇ¿´óµÄADOÖ§³Ömssql£¬·½±ã°¡£¬²»¹ÜÊÇÁ¬½Ó£¬²Ù×÷µÈ¶¼ÊÇÀÊÀÊÉÏÊÖ°¡¡£µ«ÊÇÏÖÔÚͻȻҪÓÃMySqlÁË£¬¿ªÊ¼Ã»ÓÐmssqlÄÇÑùµÄ²Ù×÷½çÃæ£¬ÎÒÕæÓеãÅų⡣°¥£¬Ã»°ì·¨£¬¹«Ë¾ÒªÇó£¬Ö»ÄÜÑо¿MySqlÔõôÓÃÁË¡£
¸Õ¿ªÊ¼¾ÍÓöµ½ÁËÒ»¸ö»ù±¾µÄÎÊ ......