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I working in SharePoint Online Provider Hosted app

I have two lists having a many to many relationship

My question is: What is best way to implement this? By lookup field or list?

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You can use lookup columns to model one-to-many relationships or one-to-one relationships between lists. However, if you require a many-to-many relationship between entities in your data model, lookup columns alone are insufficient for defining the relationship. While you could use custom user interface components to manage the relationship, a better approach is to normalize the data model. Just as you would add a join table to normalize a many-to-many relationship in a relational database, you can add a join list to normalize a many-to-many relationship between SharePoint lists.

For more details:

http://msdn.microsoft.com/en-us/library/ff798409.aspx

http://www.infowisesolutions.com/blog/comments.aspx?ArticleId=91

http://www.experts-exchange.com/Database/MS_Access/Q_27777583.html

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  • if i use multiple value lookup field. it's low performance?
    – eaam
    Jun 19, 2014 at 12:20
  • How many items are there in library?
    – Aanchal
    Jun 19, 2014 at 12:32
  • This is the only option to provide relations between lists.
    – Aanchal
    Jun 19, 2014 at 12:33
  • Relation between Courses list and Instructors list
    – eaam
    Jun 22, 2014 at 8:39
  • You have to define some relation between these lists . so you need lookup column
    – Aanchal
    Jun 22, 2014 at 9:12

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