mysql 常用命令

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　　#mysql -uroot -p
　　#show variables like '%char%'；
　　mysql> create database sockets;
　　mysql> SHOW DATABASES;

　　mysql> GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER  ON sockets.* TO sockets@mysql_zfl>　　mysql> use sockets;
　　Database changed
　　mysql> CREATE TABLE socket1 (socket_id int(6) NOT NULL primary key, socket_name varchar(45) DEFAULT NULL,                                                                                      ice double(16,2), sell_price double(16,2), score double(16,2))ENGINE=InnoDB DEFAULT CHARSET=utf8;
　　Query OK, 0 rows affected (0.03 sec)
　　mysql> INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (000795,"英洛华",5.95,8.9,5,6.5,5,60);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (002230,"科大讯飞",61.38,65.90,50.29,65.60,51.70,80);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (000725,"京东方",6.62,6.69,5.81,6.69,6.00,90);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (000002,"万科",39.10,39.10,20.92,40.10,35.59,90);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (603315,"福鞍股份",13.38,16.98,10.01,15.63,10.01,50);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (002291,"星期六",7.10,10.21,6.15,5.49,6.99,70);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (601766,"中国中车",12.16,18.39,10.27,18.40,11.85,70);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (603711,"香飘飘",31.23,31.23,26.35,31.25,26.35,90);
　　Query OK, 1 row affected (0.00 sec)
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (603321,"梅轮电梯",13.28,38.90,11.26,13.30,12.48,90);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (603277,"银都股份",19.05,35.86,17.25,19.10,17.25,90);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (002606,"大连电瓷",11.13,27.23,11.10,13.10,11.10,300);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (002899,"英派斯",29.09,49.53,26.10,29.90,10.10,30);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (002194,"武汉凡谷",9.71,15.95,7.56,11.76,9.60,20);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (603880,"南卫股份",25.92,30.26,22.38,25.90,22.30,50);
　　INSERT INTO socket1 (socket_id,socket_name,now_price,highest_price,lowest_price,buy_price,sell_price,score) VALUES (002885,"京泉华",35.18,31.26,33.95,33.20,50);