Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have a table that maps a user’s permissions to a given object. So, it is essentially a join table to 3 different tables. (Object, User, and Permission)
The values of each row will always be unique for all 3 columns, but not any 2.
I need to create a non-clustered index. I want to put the index on the foreign keys to the object and user, but I am wondering if I should put it on all 3 columns.
If you have some doubts, formulate the query(ies) you intend to execute against these tables, and run the SSMS Query Tuning Wizard. That should help you get started in the right direction.
One thing to consider is the number of rows in these three tables. If the row counts will be small, it might not even be worthwhile adding indexes. A table scan would probably be done anyway.