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sudarshan3Lsudarshan3L 

can some one tell how to convert Master detail relationship field to look up relationship

please give detail explanation
Abhishek BansalAbhishek Bansal
Converting Relationships

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.
TestSfdcTestSfdc
Converting Relationships

You can convert a master-detail relationship to a lookup relationship with out useing Roll-up summary in the master object changed. Like edit on the field Change Field Type ,change the master to lookup. 

You can convert a master-detail relationship to a lookup relationship with useing Roll-up summary in the master object delete All Roll-up and delete all child records then u can convert master to lookup.

You can convert a lookup relationship to a master relationship with useing Roll-up summary in the parent object don't delete that. child records are delete then convert lookup to master in the field.