q)When joining more than 2 tables, what rule is true?
1) All tables must be related to each other.
2)Every table must be related to at least one table.
3) A table does not have to be related.
4)There must be one table that is directly related to all other tables.
q) When using a join, which option is true about the joining columns in each table.
1) Must have the same name
2)Must have the same data type
3) Must have the same name and data type. ]
4)Must have a PK FK relationship.
5) Must have been joined in the past.