Lookup and Master-Detail Relationship

See the solution below.

Lookup: Creates a relationship that links this object to another object.

The relationship field allows users to click on a lookup icon to select a value from a popup list.

The other object is the source of the values in the list Master-detail: Creates a special type of parent-child relationship between this object (the child, or "detail") and another object (the parent, or "master").

A lookup relationship and a master-detail relationship are both types of relationships in Salesforce that allow you to link two objects together. However, there are several differences between them.

A lookup relationship is a simple relationship where one object has a field that references another object. For example, if you have a custom object called "Opportunity Line Item" and you want to link it to the standard "Product" object, you can create a lookup relationship between the two objects. In a lookup relationship, the child object (Opportunity Line Item) can exist without the parent object (Product) and the child object can have multiple parent objects.

A master-detail relationship, on the other hand, is a more restrictive relationship where one object is considered the master and the other is considered the detail. The detail object cannot exist without the master object, and each detail record can only have one master record. In a master-detail relationship, the child object inherits certain characteristics from the parent object, such as sharing and security settings, and when a master record is deleted, all of its detail records are also deleted.

Here are some of the key differences between lookup and master-detail relationships:

1. Relationship Type: A lookup relationship is a simple relationship, while a master-detail relationship is a more restrictive relationship.

2. Dependency: In a lookup relationship, the child object can exist without the parent object, while in a master-detail relationship, the child object cannot exist without the master object.

3. Cardinality: A child object can have multiple parent objects in a lookup relationship, while in a master-detail relationship, each child record can only have one master record.

4. Inheritance: In a master-detail relationship, the child object inherits certain characteristics from the parent object, such as sharing and security settings.

5. Deletion Behavior: When a master record is deleted in a master-detail relationship, all of its detail records are also deleted. In a lookup relationship, deleting a parent record does not delete the child records.

Overall, the main difference between a lookup and a master-detail relationship is that a master-detail relationship is a more restrictive relationship that provides additional functionality and control over data sharing and deletion behavior.