您好，
您可以使用主键和外键概念.
例如在表1中将car保留为主键，并引用所有三个表.
以相同的方式在各自的表中命名和分组.
它将有助于消除数据冗余.

Hi,
you can use primary key and foreign key concept.
like keep car as primary key in table1 and give its reference to all three tables.
in same way for name and group in their respective tables.
it will help to remove data redundancy.