entity-relationship-metadata-messages.md

title	description	ms.custom	ms.date	ms.reviewer	ms.topic	author	ms.subservice	ms.author	search.audienceType
Table relationship definitions messages (Microsoft Dataverse) | Microsoft Docs	The article describes the messages that you can use to create, retrieve, update, and delete relationships using Web API and SDK for .NET.		03/11/2021	pehecke	article	mayadumesh	dataverse-developer	jdaly	developer

Table relationship definitions messages

Table relationships define how tables are related to each other. This includes information about how relationships are represented in the application. Also, when actions are performed on a record, the relationship indicates what actions to perform on related records.

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The following table lists the messages that you can use to create, retrieve, update, and delete relationships.

Web API	SDK for .NET	Description
POST request on RelationshipDefinitions table. More information: Create a many-to-many relationship	xref:Microsoft.Xrm.Sdk.Messages.CreateManyToManyRequest	Creates a many-to-many relationship between two tables.
POST request on RelationshipDefinitions table. More information: Create a one-to-many relationship	xref:Microsoft.Xrm.Sdk.Messages.CreateOneToManyRequest	Creates a one-to-many relationship between two tables.
DELETE request on RelationshipDefinitions table. More information: Delete relationships	xref:Microsoft.Xrm.Sdk.Messages.DeleteRelationshipRequest	Deletes a relationship.
GET request on RelationshipDefinitions table.	xref:Microsoft.Xrm.Sdk.Messages.RetrieveRelationshipRequest	Retrieves a relationship.
PUT request on RelationshipDefinitions table. More information: Update relationships	xref:Microsoft.Xrm.Sdk.Messages.UpdateRelationshipRequest	Updates a relationship.

See also

Relationship eligibility
Configure relationship cascading behavior

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