Answer by That Brazilian Guy for What's the difference between identifying...
A complement to Daniel Dinnyes' answer:On a non-identifying relationship, you can't have the same Primary Key column (let's say, "ID") twice with the same value.However, with an identifyinig...
View ArticleAnswer by Branko Dimitrijevic for What's the difference between identifying...
Do attributes migrated from parent to child help identify1 the child?If yes: the identification-dependence exists, the relationship is identifying and the child entity is "weak".If not: the...
View ArticleAnswer by Daniel Dinnyes for What's the difference between identifying and...
Bill's answer is correct,but it is shocking to see that among all the other answers no one points out the most significant aspect.It has been said over and over again, that in an identifying...
View ArticleAnswer by Accountant م for What's the difference between identifying and...
user287724's answer gives the following example of the book and author relationship:A book however is written by an author, and the author could have written multiple books. But the book needs to be...
View ArticleAnswer by Daniel Pinheiro for What's the difference between identifying and...
Like well explained in the link below, an identifying relation is somewhat like a weak entity type relation to its parent in the ER conceptual model. UML style CADs for data modeling do not use ER...
View ArticleAnswer by Daishi for What's the difference between identifying and...
If you consider that the child item should be deleted when the parent is deleted, then it is an identifying relationship.If the child item should be kept even though the parent is deleted, then it is a...
View ArticleAnswer by Sarvar Nishonboyev for What's the difference between identifying...
Let's say we have those tables:user--------idnamecomments------------comment_iduser_idtextrelationship between those two tables will identifiying relationship. Because, comments only can be belong to...
View ArticleAnswer by Skarllot for What's the difference between identifying and...
Non-identifying relationshipA non-identifying relationship means that a child is related to parent but it can be identified on its own.PERSON ACCOUNT====== =======pk(id) pk(id)name fk(person_id)...
View ArticleAnswer by sp1rs for What's the difference between identifying and...
An identifying relationship is between two strong entities. A non-identifying relationship may not always be a relationship between a strong entity and a weak entity. There may exist a situation where...
View ArticleAnswer by chanchal dixit for What's the difference between identifying and...
The identifying relationship means the child entity is totally dependant on the existence of the parent entity.Example An account table person table and personAccount.The person account table is...
View ArticleAnswer by user287724 for What's the difference between identifying and...
There is another explanation from the real world:A book belongs to an owner, and an owner can own multiple books. But, the book can exist also without the owner, and ownership of it can change from one...
View ArticleAnswer by Walter Mitty for What's the difference between identifying and...
A good example comes from order processing. An order from a customer typically has an Order Number that identifies the order, some data that occurs once per order such as the order date and the...
View ArticleAnswer by Bill Karwin for What's the difference between identifying and...
An identifying relationship is when the existence of a row in a child table depends on a row in a parent table. This may be confusing because it's common practice these days to create a pseudokey for a...
View ArticleAnswer by Andy White for What's the difference between identifying and...
Here's a good description:Relationships between two entities may be classified as being either "identifying" or "non-identifying". Identifying relationships exist when the primary key of the parent...
View ArticleAnswer by Christian C. Salvadó for What's the difference between identifying...
An Identifying relationship specifies that a child object cannotexist without the parent objectNon-identifying relationships specifies a regular associationbetween objects, 1:1 or 1:n...
View ArticleWhat's the difference between identifying and non-identifying relationships?
I haven't been able to fully grasp the differences. Can you describe both concepts and use real world examples?
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