What is a master detail relationship?

Asked By: Shengwei Marra | Last Updated: 20th June, 2020
Category: technology and computing databases
4.6/5 (149 Views . 38 Votes)
Master-detail relationship is like parent-child relationship where, master represents a parent and detail represents a child in which master object controls some behaviors of the detail object. Like whenever a Master object record is deleted then the detail object related to it also gets deleted.

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Keeping this in view, when should you use a lookup instead of a master detail relationship?

A typical use of a Master-Detail would be the classic Sales Order and Sales Order Items objects. Lookups are generally for use where you may or may need to have a relationship between two objects (but not always). Lookups are generally used to reference commonly shared data, such as reference data.

Additionally, what is true about master detail relationships? It is a custom field which links one object record to another. Through the creation of relationships, we can display the data of all the related records in the record's details page. The Master Detail relationship is used when we want to control the display of detail records based on the value in the master record.

Keeping this in view, what is a lookup relationship?

A Lookup relationship involves finding value of a field based on the value in another field in another object. It is mostly used in the case of commonly shared data between two objects.

What is the key difference between a master detail Realationship and a lookup relationship?

Instead we have to first create Look up fields then fill all the records with that lookup filed. After that we can convert the lookup fields to masterdetail relationship. If we delete master records then detail (Child) records are deleted. It creates the parent(master) child(Detail) relationship between objects.

30 Related Question Answers Found

How does a lookup field work in Salesforce?

In Salesforce, you can use a lookup field to associate two records in a relationship. For example, a user can associate a contact record to an account record using the Account Name lookup field. When editing a lookup field, the user must find the right record to associate.

How many master detail relationships can you have on an object?

3 Answers. There is only 2 Master Detail Relationship allowed per object and it can have upto three custom detail levels. Each object is allowed to have one or two masters, or up to 8 details. You can have a Total of 40 Relationship fields with a Maximum of 2 Master Detail Relationships.

Can we convert master detail to lookup?

You can convert a master-detail relationship to a lookup relationship as long as no roll-up summary fields exist on the master object. You can convert a lookup relationship to a master-detail relationship, but only if the lookup field in all records contains a value.

What is SOQL used for?

Salesforce Object Query Language (SOQL) Use the Salesforce Object Query Language (SOQL) to search your organization's Salesforce data for specific information. SOQL is similar to the SELECT statement in the widely used Structured Query Language (SQL) but is designed specifically for Salesforce data.

How do you create a master detail relationship?


All Answers
  1. From Setup, enter Objects in the Quick Find box, then select custom object.
  2. Click Review.
  3. In the Custom Fields & Relationships related list, click New.
  4. Select Master-Detail Relationship, and click Next.
  5. In the Related To drop-down list, choose account, and click Next.

Can we convert lookup into master detail relationship and how?

You can convert a lookup relationship to a master-detail relationship, but only if the lookup field in all records contains a value. You can create a relationship from an object to itself, but it must be a lookup relationship, and a single record can't be linked to itself.

What is a lookup field?

A lookup field is a read-only field that displays values at runtime based on search criteria you specify. In its simplest form, a lookup field is passed the name of an existing field to search on, a field value to search for, and a different field in a lookup dataset whose value it should display.

How many relationship types are in Salesforce?

There are two types of relationships among objects in Salesforce, which are lookup relationships and master-detail relationships.

What is self relationship in Salesforce?

Self-relationship: When an object has a lookup with itself, it is a self-relationship. A self relationship creates a tree diagram of the objects. For example, the account has a lookup on himself, called Parent Account.

How many types of relationships are there in Salesforce?


Salesforce provides the following types of relationships that can be established among objects:
  • Master-detail relationship.
  • Lookup relationship.
  • Self-relationship.
  • External lookup relationship.
  • Indirect lookup relationship.
  • Many-to-many relationship (junction object)
  • Hierarchical relationship.

On which object is a master detail relationship established?

Master-detail relationship can be defined between custom objects or between a standard object and a custom object. The detail object automatically gets the security and sharing settings given to the master object. A child of one master detail relationship can't become a parent of another object.

What are the main things need to consider in the master detail relationship?

What are the main things need to consider in the “Master-Detail Relationship”? Parent reference become mandatory for child object. Standard objects can't become child of any object. Master details support Cascaded delete: if you delete the parent, it can cascade delete the child.

What are the standard lightning components?

Standard components are Lightning components built by Salesforce.

It supports all public and shared list views that are associated with standard and custom objects, except:
  • Activity.
  • ContentVersion (Files)
  • Task.
  • User.
  • UserProfile.

Can we create master detail relationship between two standard objects?


However, the standard object cannot be on the detail side of a relationship with a custom object. In addition, you cannot create a master-detail relationship in which the User or Lead objects are the master. There are indeed Master Detail relationship between Standard object.

What is master detail and lookup relationship in Salesforce?

While lookup relationships are fairly casual, master-detail relationships are a bit tighter. In this type of relationship, one object is the master and another is the detail. The master object controls certain behaviors of the detail object, like who can view the detail's data.

What is roll up summary in SalesForce?

A roll-up summary field calculates values from related records, such as those in a related list. You can create a roll-up summary field to display a value in a master record based on the values of fields in a detail record.