多对多relatioship

Question

我有这样的实体关系：

我想保存有关当前团队和最后的球队信息，还我保存每个团队的不同位置。

我创建这个表：

球员的表：

create table player(

    codPlayer varchar(12) primary key, 
    name varchar(30) unique not null, 
    codCurrentTeam varchar(12), 
    position varchar(20), 
    foreign key (codCurrentTeam) references team(codTeam) 
); 

团队表：

create table team(

    codTeam varchar(12) primary key, 
    name varchar(40) unique not null 

); 

lastTeam表：

create table lastTeam(

    startDate date, 
    finishDate date, 
    codTeam varchar(12), 
    codPlayer varchar(12), 
    constraint pkLastTeam primary key (codTeam,codPlayer), 
    foreign key (codTeam) references team(codTeam), 
    foreign Key (codPlayer) references jugador (codPlayer) 
); 

位置的表：

create table position(

    codPlayer varchar(12), 
    codLastTeam varchar(24), 
    position varchar(20), 
    primary key (codPlayer, codLastTeam), 
    foreign key (codPlayer) references jugador(codPlayer), 
    foreign key (codLastTeam) references lastTeam(pkLastTeam) 

); 

我可以创建不同的位置中的所有表中，MySQL会返回一个错误：

Error Code: 1215. Cannot add foreign key constraint

也许我的图有一些错误，但我不知道如何实现设计

Answer 1

问题是你没有在lastTeam牛逼

创建表的位置“pkLastTeam”列

codPlayer varchar(12), 
    codLastTeam varchar(24), 
    position varchar(20), 
    primary key (codPlayer, codLastTeam), 
    foreign key (codPlayer) references jugador(codPlayer), 
    foreign key (codLastTeam) references lastTeam(pkLastTeam) 

); 

Answer 2

我想我能解决增加新的atributte codPlayer1和改变pkLastTeam为codTeam，codPlayer1这个问题。 表是这样的：

create table position(

    codPlayer varchar(12), 
    codTeam varchar(12), 
    codPlayer1 varchar(12), 
    position varchar(20), 
    primary key (codPlayer, codTeam,codPlayer1), 
    foreign key (codPlayer) references player(codPlayer), 
    foreign key (codPlayer,codPlayer1) references lastTeam(codTeam,codPlayer) 

);