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4
votes
1answer
842 views

What permissions are needed to view dependencies?

My company is moving to a much more restrictive security model in the near future. As part of that we are changing specific servers to the new model and testing all our existing processes. One of ...
3
votes
1answer
54 views

Drop partition scheme with orphan indexes

I have a partition scheme in my SQL Server database that I am trying to drop. This scheme was used by 2 indexes, which I deleted. I can't delete the scheme, since it appears to still be used by the ...
3
votes
2answers
358 views

multivalued weak key in ER database modeling

I was wondering since i didnt find out any clarification for this. I want to store movies that exist in different formats (dvd, bluray etc) and the price for each format differs from each other as ...
2
votes
1answer
56 views

How to find out if anything is running as or relies upon a user account in anyway before removing it?

Running SQL Server 2008. So I need to get around to removing an old users account, but I'm worried that just disabling or deleting it right away might cause some things to stop working properly if ...
2
votes
2answers
556 views

Why is this relation in 3NF?

I have a relation: R4 = {{T,U,V}, {T → U, U → T, T → V}} I know from looking at the answer key that this relation is in BCNF. I'm going through the process of rigorously determining what normal ...
1
vote
2answers
109 views

Relations, dependencies and normal form

I have some issues in understanding about relations and dependencies. I will show two examples and what I want to know: Assume the relation GTX {G,T,X} with the following dependencies: G,X -> T ...
1
vote
1answer
23 views

Optimizing bulk update performance in Postgresql with dependencies

Basically my question is the same as this one, but WITH dependencies, so drop/renaming the table is not a trivial option (I assume). We are refactoring a large, poorly designed table which has many ...
1
vote
0answers
27 views

Identifying functional dependencies

I'm having trouble understanding the logic in use for identifying functional dependancies. Looking at the sample relation below, I understand fd1 - fd3. But when I look at fd4 and fd5, its logic ...
0
votes
1answer
78 views

Converted ERD into Dependency Diagram 1NF, 3NF

Thats the ERD. I'm studying for an upcoming test and having trouble getting my head around converting thes ERDs into dependency diagrams. This is from a previous exam that the Lecturer told us to ...
0
votes
0answers
12 views

Functional Dependencies Query

I am having a confusion in Functional Dependencies I have a relation R(A,B,C,D,E,F) Where {A, B} is the key And the FD set I have is {A->FC, C->D, B->E} What Normal Form is it in? Basically I want ...