Entity Relationship Model / Relational Model and Normalization of Attributes -


i have following question. if have relation such

request = {[request_id: int,status: string,start_time: date]}

request_id primary attribute , status , start_time normal attributes.

if normalize status string int example ref_status table this.

status_id | status name

1 | new

2 | old

3 | finished

does through normalization attribute status become entity ?

attributes used characterize entity status-id @ same time foreign key different table though holds name hint me entity.

i glad if me out this.

thank in advance , hope question clear.

what you're describing introducing surrogate key status. has nothing normalization.

entities in chen's er model represented values, , status can interpreted entity regardless of whether it's represented int in 1 table or string in another.


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