mysql ·Ö×é»ã×Ü
1.´´½¨±í£º
create table groupTable(dept varchar(6),phone varchar(20),amount int);
2.²åÈë²âÊÔÊý¾Ý£º
insert groupTable
select 'ÓªÒµ²¿',8001,20 union all
select 'ÓªÒµ²¿',8002,30 union all
select '²ÆÎñ²¿',6001,10 union all
select '²ÆÎñ²¿',6003,100;
3.mysql Óï¾ä£º
select ifnull(dept,'×ܼÆ') as '²¿ÃÅ',ifnull(phone,'С¼Æ') as 'µç»°',sum(money) as '½ð¶î' from groupTable group by
dept,phone with rollup;
4.½á¹ûÏÔʾ£º
+--------+------+------+
| ²¿ÃÅ | µç»° | ½ð¶î |
+--------+------+------+
| ²ÆÎñ²¿ | 6001 | 10 |
| ²ÆÎñ²¿ | 6003 | 100 |
| ²ÆÎñ²¿ | С¼Æ | 110 |
| ÓªÒµ²¿ | 8001 | 20 |
| ÓªÒµ²¿ | 8002 | 30 |
| ÓªÒµ²¿ | С¼Æ | 50 |
| ×Ü¼Æ | С¼Æ | 160 |
+--------+------+------+
Ïà¹ØÎĵµ£º
ÔÚÊý¾Ý¿â±íÖУ¬¶Ô×ֶν¨Á¢Ë÷Òý¿ÉÒÔ´ó´óÌá¸ß²éѯËٶȡ£¼ÙÈçÎÒÃÇ´´½¨ÁËÒ»¸ö mytable±í£º
CREATE TABLE mytable(
ID INT NOT NULL,
username VARCHAR(16) NOT NULL
);
ÎÒÃÇËæ»úÏòÀïÃæ²åÈëÁË10000Ìõ¼Ç¼£¬ÆäÖÐÓÐÒ»Ìõ£º5555, admin¡£
ÔÚ²éÕÒusername="admin"µÄ¼Ç¼ SELECT * from mytable WHERE username='admin';ʱ£¬Èç¹ ......
Ubuntu 9.04 ÏÂÓÃÔ´°²×°ÁËMySQL¡£Ä¬ÈÏÇé¿öÏ£¬ÓÃmysql shellµÇ¼´´½¨Êý¾Ý¿â´´½¨±í²åÈëÖÐÎÄÊý¾Ýºó£¬ÓÃselect²é³öÀ´ÊÇÖÐÎÄ£¬µ«ÓÃJDBCÁ¬½Ó¾Í³öÏÖÂÒÂë¡£ÍøÉÏËÑË÷µ½½â¾ö·½·¨£¬ÈçÏ£¨Ïȱ¸·ÝÊý¾Ý£©£º
ÐÞ¸Ä/etc/mysql/my.cnf
sudo gedit /etc/mysql/my.cnf
ÔÚmy.cnfÎļþÖеÄ[client] ......
¡¡¡¡ÒÔMySQL-server-4.0.14-0.i386.rpmΪÀý£¬·ÅÔÚ/dataĿ¼ÏÂ
¡¡¡¡cd /data
¡¡¡¡rpm -ivh MySQL-server-4.0.14-0.i386.rpm
¡¡¡¡°²×°Íê³ÉºóÔÚ/usr/share/mysqlĿ¼ÖлáÓÐÒ»¸ömysqlµÄÆô¶¯½Å±¾mysql.server¼°Ê¾ÀýÅäÖÃÎļþµÈ(Èçmy-huge.cnf¡¢my-large.cnf¡¢my-medium.cnf)
¡¡¡¡¿½±´Ò»¸öʾÀýÅäÖÃÎ ......
1¡¢µÇ½MySQL:
mysql -u root -p
2¡¢²é¿´Óû§ÐÅÏ¢
select user,host,password from mysql.user;
select user,host from mysql.user;
3¡¢ÉèÖÃÃÜÂë
set password for root@localhost=password('
ÔÚÕâÀïÌîÈërootÃÜÂë
');
4¡¢ÐÞ¸ÄÃÜÂë
·½·¨1£ºmysqladmin -u root -p password newpassword
·½·¨2£º ££mysql -u root ......