When should you use a lookup instead of a master detail relationship?

When should you use a lookup instead of a master detail relationship?

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.

Can we update master detail field?

The only available recourse now is to delete and recreate the record with the new value in the Master-Detail Lookup field.

What is the difference between a look up and master detail relationship?

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.

Can we delete master object in master detail relationship?

If you delete a 'master-detail' relationship, it will revert to a 'lookup' and you can expect the following repercussions: You cannot easily revert the field back to master-detail, unless all child objects have a specified parent. Child records will no longer be automatically deleted when the parent record is deleted.

Can we convert lookup into master detail relationship and how?

To convert lookup to the master-detail relationship you need to give parent records on all child records. Then only you can convert a lookup relationship to a master-detail relationship if the lookup field in all the records contains a value.

Which field types could be used in roll up summary fields?

You can create roll-up summary fields that automatically display a value on a master record based on the values of records in a detail record....The Roll up Summary field is basically of 4 types:

  • Count.
  • Sum.
  • Min.
  • Max.

What is master detail field?

It is a custom field which links one object record to another. ... The Master Detail relationship is used when we want to control the display of detail records based on the value in the master record.

What is the limit of master-detail relationship per object?

2 master- Do take note, a single object can have a maximum of 2 master-detail relationships....Lookups vs. Master-Detail Relationships.
Lookup relationshipMaster-detail relationship
Standard object record can be on the detail side of a custom object in a lookup relationship.Standard object record cannot be a child.

What happens to detail record when a master record is deleted?

Master-detail Relationship It means If we delete master records then detail (Child) records are deleted. The Master-Detail Relationship is used when we want to control the display of detail records based on the master record. Rollup-summary field can be created in a master-detail relationship.

Can we create master detail relationship on existing records?

We can't create a Master-detail relationship on existing records. To do that, we have to create a lookup relationship for that record and then convert it into master detail. To convert a lookup relationship to a master detail the existing record should consist of valid lookup field values.

How to convert master detail to look up?

You can convert the master detail relationship to look up by editing that particular field go to that field ->change data type-> select look up relationship. Note that You can convert a master-detail relationship to a lookup relationship as long as no roll-up summary fields exist on the master object.

Can a lookup relationship be converted to a master-detail relationship?

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. Then do you think the first quote in my post just plain wrong?

How to create a master detail relationship in Salesforce?

You cannot create a new Master-Detail relationship on an existing custom object if records already exist. You must first create a Lookup relationship, populate the lookup field with data in all records, and then change the relationship type to Master-Detail


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