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Ckevin1984 Question about Look-up relationship and Master-detail relationship
Can i do the rollup summary in the other object in a Look-up relationship just like doing the rollup summary in the parent object in the Master-detail relationship. And if it is possible, can you tell me the differences between the two object types. Waiting for your helps.
No, you cannot have a rollup summary field that uses a Lookup relationship. it must be on the parent of the master/detail relationship.
Lookup Relationships:
Loosely coupled
Child field value may be optional
No cascade delete
Independent ownership & sharing
Maximum 25 lookup relationships per child
Master/Detail Relationships:
Tightly coupled
Child field value is always required
Cascade delete
Inherited ownership & sharing
Maximum 2 master relationships per detail object
Can be multiple levels deep
If master is a standard object: 2 additional subdetails
If master is a custom object: 3 additional subdetails
Roll up Summary is only available with the Master-detail relationship. Rolling up of Summary on lookup relationship can
be achieved through the trigger on insert, delete events.
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HI John,
In master-detail----->
Its master field value which is always required on Child.
And cascade delete is on master...If you delete master then childs also can be deleted.
---->Can be multiple levels deep
If master is a standard object: 2 additional subdetails
If master is a custom object: 3 additional subdetails
for these statements u mean if childobj1 has master as masterobj1...then masterobj1 may also have 2 more which means
total 3 details....But a master can have multiple details ri8???
Can u explain what it was exactly????