Question

I’m having some trouble with and sql server many to many relationship, i already created the linker table but i don’t understand what to do now i’m gonna post the database diagram for you guys to check out don’t mind the Portuguese on it i will make a way for you guys to understand,

the table Jogadores means players, the tables Paises means Countries, the table posicoes means positions, the idea is that one player can have more than one position and more than one nationality winch is a field in the countries table.

Now how do i use the linker table that is the Posicao_Pais to do that?

Answer 1

the table Posicao_Pais has to have at least 3 fields…

id_player
id_position
id_country

u don’t need a relation between position and country cause is the player who has the relations… then u relation the tables to this one

So you should call it Player_Position_country

other way:

create table player(
id_player int primary key identity,
.
.
.);
go;
create table position(
id_position int primary key identity,
.
.
.);
go;
create table country(
id_country int primary key identity,
.
.
.);
go;
create table player_position(
id_player references player,
id_position references position);
go;
create table player_country(
id_player references player,
id_country references country);
go;

this way in your add procedure u will add first the player, then the country, then the position and then the relations