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  1. #1
    Join Date
    Oct 2011
    Posts
    12

    Unanswered: Do you have to index a foreign key (also as primary key in another table)?

    Do I have to index the foreign keys (a composite primary key) in another table?
    Also, I like to ask...is a primary key already indexed?

  2. #2
    Join Date
    Aug 2003
    Location
    Where the Surf Meets the Turf @Del Mar, CA
    Posts
    7,776
    Provided Answers: 1
    >Do I have to index the foreign keys (a composite primary key) in another table?
    Have to? NO
    Should do so? yes

    >Also, I like to ask...is a primary key already indexed?
    yes
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