Database Relationship ??
😕😔😔😔😔😕😕
Hi,
I have confusion of representation of relationships in database schema suppose A ir private owner who owns B property for rent are tables as shown below
Table- PrivateOwner Table- Propertyfor_rent
Ownerno 0...1 (Powns ->) 1...* propertyno
lname -------------------------------------- street
address city
Please database experts can u tell exactly what are the above relationships show , i know 1..* means one to many or 1....1 ie one to one , but i want to know that relationship shown above ie 0...1 -------- 1..* from private owner who owns the property to property for rent means what ?. Is it 1...1 one to one relationship shown between them if yes , then why for individual table 0..1 and 1...* is shown , please clarify on this , thanks !!
Hi,
I have confusion of representation of relationships in database schema suppose A ir private owner who owns B property for rent are tables as shown below
Table- PrivateOwner Table- Propertyfor_rent
Ownerno 0...1 (Powns ->) 1...* propertyno
lname -------------------------------------- street
address city
Please database experts can u tell exactly what are the above relationships show , i know 1..* means one to many or 1....1 ie one to one , but i want to know that relationship shown above ie 0...1 -------- 1..* from private owner who owns the property to property for rent means what ?. Is it 1...1 one to one relationship shown between them if yes , then why for individual table 0..1 and 1...* is shown , please clarify on this , thanks !!
Replies
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PraveenKumar Purushothaman
1...* is one to many...king99😕😔😔😔😔😕😕
Hi,
I have confusion of representation of relationships in database schema suppose A ir private owner who owns B property for rent are tables as shown below
Table- PrivateOwner Table- Propertyfor_rent Ownerno 0...1 (Powns ->) 1...* propertyno lname -------------------------------------- street address cityPlease database experts can u tell exactly what are the above relationships show , i know 1..* means one to many or 1....1 ie one to one , but i want to know that relationship shown above ie 0...1 -------- 1..* from private owner who owns the property to property for rent means what ?. Is it 1...1 one to one relationship shown between them if yes , then why for individual table 0..1 and 1...* is shown , please clarify on this , thanks !!
1...1 is one to one...
0...1 is zero to one...
*...* is many to many...
In your case, the owner, can be an owner only if he owns atleast one. He can own either one or more than one. Hence one to many... 😀
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