Question

I have a question regarding DataBase design.

I have a Entity Table named: CARS
and
I have a Lookup Table named: COLORS

Table CARS has: Id, Name
and
Table COLORS has just: ColorName

Table COLORS has a short list of colors, instead CARS could have a long list of entities.

CARS has a Primary Key on ID.

My questions are:

• Adding a Primary Key on Lookup Table COLORS on ColorName, could improve performance?

Table CARS will have a CLUSTERED INDEX on ID.

• Would you make sense have a CLUSTERED INDEX on CARS on ColorName
  Thanks gus for your time!

Answer 1

Clustered indexes can increase the speed of retrieval or inserts, but only when the data is retrieved or updated/inserted in the order that matches the index order.

Otherwise it can decrease performance.

For more detailed answer the question needs to be more specific.