Differences between relationships (1-1, 1-many, many-many)
I am just starting to learn about relationships, and I am confused as the to the differences between the three types….
I have a practice database already started by someone else which has six tables. The primary key/ unique ID is called individual and this is found in all six of the tables, so does this mean I don't have a foreign key? And what type of relationship is this? Is this a one to one- is that what the relationship links show below?