mysql创建表:
mysql>创建表用户(
->userid int(4)主键not null auto_increment，
->用户名varchar(16)不为空，
->userpassword varchar(32) not null
->
创建表log(
logid int(4) primary key not null auto_increment，
logtitle varchar(32) not null，
logcontent varchar(160) not null，
logtime datetime not null，
userip varchar(64) not null
)
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