一,查詢
取倒數第二條資料:
select * from (select * from shop order by 'article' desc limit 2) as b order by 'article' asc limit 1;
聯合查詢:
select w.webname, w.owner, w.customercode,c.agentid, c.certype, c. cerid,c.customername from `webinfo` as w, `customerinfo` as c where w.customercode = c.customercode;
不顯示重複字段資料:
select distinct name from test;
二,更新
update `message` set `gowhere` = 'smsaddr' where `gowhere` = 'smsaddress' limit 1 ;
三,刪除
delete student where id=1;
drop database test;(慎用)
drop table student;(慎用)
四,建立
create table `student` (
`id` int(11) not null auto_increment,
`name` varchar(20) default null,
`stuno` varchar(20) default null,
`starttime` date default null,
primary key (`id`)
) engine=myisam default charset=utf8 max_rows=4;
五,增加
insert into employees values (1,"bob","smith","128 here st", "marketing manager");
insert into student (id,name,stuno,starttime) values (1,"fordream","xyzx55888","2003-01-02");
六,其它
mysql改變編碼
alter table salary default character set utf8 collate utf8_bin;
給某錶增加一欄位
alter table `message` add `gowhere` varchar( 10 ) not null ;
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