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Hi Venkateswararao,Master-Detail relationships are more tightly coupled relationships.Master-Detail relationships have the following properties.• When two objects are in Master-Detail relationship (also called master-child relationship) the detail/child follows the master.• The ownership of the child record is given to the master objects owner. The child does not have separate owner.• The detail inherits the sharing, security settings as well as the look and feel of the master.• A master record is always required for storing the child record.While creating a Master-Detail relationship; there must be absolutely no record of the object. If there are some records, create a lookup instead. Fill the lookup fields of all the records and then convert it into a Master-Detail. • If the master record is deleted, the child record is also deleted.• In a Master-Detail relationship between a standard object and custom object,the custom object will always be the detail record.• An object can maximum of two master objects. In cases of multiple objects,both the masters are required. If one master is deleted, the child object gets deleted immediately.• A Master-Detail can be multiple level deep, parent-child-grand-children.Please let me know if this helpsBest RegardsNaga kiran
