FirefoxRocks
Apr 12 2009, 12:41 AM
| | I'm wondering what the most efficient way of doing this is. I have a table with users in it, each user has a unique id. Now suppose I had a table with groups in it. Each user can join the group. I estimate that the maximum size of a group would be 100 users.
How do I store the user IDs in the group table? Do I make a column called `members` and store them in a semicolon separated list? If so, how do I delete members?
Then again, there might be other methods I've never even thought of so I'm open to ideas. If it helps, a user could join probably 10-15 groups (this could change). |
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yordan
Apr 12 2009, 10:16 AM
Of course you don't need to store the username in the group table, because there is already a table associating the userid to his name. I would like to know if each user is in a unique group ? Then, the table could have two colums, groupid and userid.
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FirefoxRocks
Apr 12 2009, 03:39 PM
No, the user can join more than 1 group. In another forum I was told to make a table that contains the user ID and the group ID.
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yordan
Apr 12 2009, 06:15 PM
QUOTE (FirefoxRocks @ Apr 12 2009, 05:39 PM)  No, the user can join more than 1 group. In another forum I was told to make a table that contains the user ID and the group ID. Correct, in a relational model, a table with userid and groupid is the best way.
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