Question

I have two table in my database. One called person and one called team. A person can be on one team.
How do I check to find all the people in person that are not on a team using LINQ or sql??

Answer 1

How do you represent the linkage of a person to a team. Do you use a teamID field in person? If so, what do you do when a person is not on a team? Keep it null?

select * from person where teamID is null

Set it to -1?

select * from person where teamID == -1

Maybe you have a person_team cross table (which would be odd because you said that a person could only be on one team). If so

SELECT * FROM person LEFT OUTER JOIN person_team
 ON (person.id = person_team.personID)
 WHERE person_team.personID IS NULL    

Or if you have something else — tell us.