Where to place derived attributes
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I have an assignment which requires me to design a database.
I have 3 entities WARD, BED, and BED_ASSIGMENT which is the composite entity between BED and WARD.
BED primary key consists of bed_id, ward_id (each ward has bed number 1 for example, so I need ward_id to properly identify it)
My question is:
I have two attributes: "total_bed_ count" and "total_vacant_bed_count". In which entity should I place them?
thank you,
erd
asked 3 mins ago
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I have an assignment which requires me to design a database.
I have 3 entities WARD, BED, and BED_ASSIGMENT which is the composite entity between BED and WARD.
BED primary key consists of bed_id, ward_id (each ward has bed number 1 for example, so I need ward_id to properly identify it)
My question is:
I have two attributes: "total_bed_ count" and "total_vacant_bed_count". In which entity should I place them?
thank you,
erd
asked 3 mins ago
MyaccountMyaccount
1
New contributor
Myaccount is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have an assignment which requires me to design a database.
I have 3 entities WARD, BED, and BED_ASSIGMENT which is the composite entity between BED and WARD.
BED primary key consists of bed_id, ward_id (each ward has bed number 1 for example, so I need ward_id to properly identify it)
My question is:
I have two attributes: "total_bed_ count" and "total_vacant_bed_count". In which entity should I place them?
thank you,
erd
asked 3 mins ago
MyaccountMyaccount
1
New contributor
Myaccount is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have an assignment which requires me to design a database.
I have 3 entities WARD, BED, and BED_ASSIGMENT which is the composite entity between BED and WARD.
BED primary key consists of bed_id, ward_id (each ward has bed number 1 for example, so I need ward_id to properly identify it)
My question is:
I have two attributes: "total_bed_ count" and "total_vacant_bed_count". In which entity should I place them?
thank you,
erd
erd
asked 3 mins ago
MyaccountMyaccount
1
New contributor
Myaccount is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
MyaccountMyaccount
1
New contributor
Myaccount is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
MyaccountMyaccount
1
New contributor
Myaccount is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
MyaccountMyaccount
1
asked 3 mins ago
MyaccountMyaccount
1
1
New contributor
Myaccount is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Myaccount is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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add a comment |
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