How do you implement one to one, one to many, and many to many relationships while designing tables?

"One-to-one relationships are defined as one record in a table being associated with one and only one record in another table. One-to-many relationships are established by associating a single record in one table with multiple records in another table. This requires the use of primary and foreign keys. Many-to-many relationships associate several records in one table with several records in another table. An example of this is a table full of customer names associated with a table full of products they can purchase. Again the use of primary and foreign keys as required. This type of relationship is also facilitated through the use of a join table."