0
votes
2answers
277 views

Can a surrogate key and a primary key be in the same table?

For example we have: Surrogate key: ABC123 Primary key: 1 Name: James Is this legit in a Data Warehouse table?
0
votes
1answer
41 views

Create two tables with identical superkeys?

I have an existing table called Realms. This has the superkey rlmID (just a surrogate key). We are planning to add tables that group realms in some context -- let's just calll them RealmGroups. ...
0
votes
1answer
97 views

Is it acceptable to have a surrogate/primary key of one table be the primary/foreign key of another table?

For my purposes I'm trying to apply this to Microsoft SQL, but would like to know if there are restrictions for other DBMS regarding this. I don't know how to represent UML as ascii characters so if ...
2
votes
2answers
339 views

Replacing composite key with surrogate

I have the following table that has a couple of million rows in it and is 99% fragmented virtually all of the time. My plan was to insert a IDENTITY field as a surrogate key to replace the current ...