摘要： create table behavior(userid varchar(40) not null,date varchar(15) not null,T int(10),P varchar(20),I varchar(10),U varchar(5000),A varchar(10),B varchar(10),V varchar(100),W varchar(10),N varchar(20),C varchar(20));ALTER TABLE behavior MODIFY COLUMN P VARCHAR(14) CHARACTER SET gbk COLLATE gbk_ch... 阅读全文