54 lines
1.6 KiB
MySQL
54 lines
1.6 KiB
MySQL
|
drop database if exists sharebike;
|
||
|
|
|
||
|
|
create database sharebike default charset utf8;
|
||
|
|
|
||
|
|
use sharebike;
|
||
|
|
|
||
|
|
create table tb_city
|
||
|
|
(
|
||
|
|
cityid integer not null auto_increment,
|
||
|
|
cityname varchar(20) not null,
|
||
|
|
primary key (cityid)
|
||
|
|
);
|
||
|
|
|
||
|
|
create table tb_user
|
||
|
|
(
|
||
|
|
userid integer not null auto_increment,
|
||
|
|
nickname varchar(50) not null,
|
||
|
|
tel char(11) not null,
|
||
|
|
cityid integer not null,
|
||
|
|
regdate date,
|
||
|
|
primary key (userid)
|
||
|
|
);
|
||
|
|
|
||
|
|
create table tb_bike
|
||
|
|
(
|
||
|
|
bikeid integer not null auto_increment,
|
||
|
|
statecode integer default 0,
|
||
|
|
broken bit default 0,
|
||
|
|
primary key (bikeid)
|
||
|
|
);
|
||
|
|
|
||
|
|
create table tb_record
|
||
|
|
(
|
||
|
|
recordid integer not null auto_increment,
|
||
|
|
userid integer not null,
|
||
|
|
bikeid integer not null,
|
||
|
|
begintime datetime not null,
|
||
|
|
endtime datetime,
|
||
|
|
payway integer,
|
||
|
|
cost float,
|
||
|
|
primary key (recordid)
|
||
|
|
);
|
||
|
|
|
||
|
|
alter table tb_record add constraint fk_record_userid foreign key (userid) references tb_user (userid);
|
||
|
|
|
||
|
|
alter table tb_record add constraint fk_record_bikeid foreign key (bikeid) references tb_bike (bikeid);
|
||
|
|
|
||
|
|
select cityname, total from (select cityid, count(cityid) as total from tb_user group by cityid) t1 inner join tb_city t2 on t1.cityid=t2.cityid;
|
||
|
|
|
||
|
|
select max(total) from (select userid, count(userid) as total from tb_record group by userid) t1
|
||
|
|
|
||
|
|
select nickname, cityname from (select userid, count(userid) as total from tb_record group by userid having total=(select max(total) from (select userid, count(userid) as total from tb_record group by userid) t1)) t2 inner join tb_user as t3 on t2.userid=t3.userid inner join tb_city as t4 on t3.cityid=t4.cityid;
|
||
|
|
|
||
|
|
select bikeid, broken from tb_bike
|