CODEWITHSUNDEEP
mysqlsqlmany-to-many
Bunion
Bunion

Reputation: 461

many to many relationship sql

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What can i add to these three tables to allow a "family" to have many students and a family to have many parents?

i am struggling to get my head around what i could add which would allow me to do this.

Thanks

Upvotes: 1

Views: 1256

Answers (1)

Dave Kelly
Dave Kelly

Reputation: 129

You need to add a foreign key in student and parent that maps back to family_id, Remove parent_id and student_id in the Family table. If you need to find all member of family 22

select * from family f 
join parent p on f.family_id=p.family_id
join student s on s.family_id=f.family_id
where f.family_id=22

Upvotes: 2

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