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Tanmay 2022-07-08 15:06:09 +01:00
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database/notes/02-integrity-er-diagram.md
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@ -193,7 +193,7 @@ A student can only have one email address and one email address can be associate
![One to One](../media/one-to-one.png) ![One to One](../media/one-to-one.png)
An attribute shared by both entities can be added to either of the entities. An attribute shared by both entities can be added to either of the entities.
**One to Many (1:m)** **One to Many or Many to one (1:m or m:1)**
> When one instance of entity 1 is related to more than one instance of entity 2, the relationship is referred to as "one-to-many. > When one instance of entity 1 is related to more than one instance of entity 2, the relationship is referred to as "one-to-many.
A student can only be associated with one batch, but a batch can have many students. A student can only be associated with one batch, but a batch can have many students.