How to Create Many-to-Many Relate in ArcMap?

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08-15-2014 04:23 PM
TimMinter
Occasional Contributor III

Has anyone had any success specifying many-to-many cardinality when creating an ArcMap Relate? 

 

What I've tried:  The Relate dialog lets me pick the primary key field, the target table, the foreign key field, and then it lets me name the relate.  I don't get to specify cardinality as I do when creating a geodatabase relationship class.  The end result appears to support a 1:1 or 1:M relate, but befuddles me regarding the advertised and desired M:N relate.  The instructions suggest that an ArcMap M:N relate is supported, but the "how to" information is elusive.

 

Hopefully, I'm just slipping up somewhere... surely there's a button to press to specify cardinality and make it work.

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RiyasDeen
Occasional Contributor III

Hi Tim,

On the fly M:N relate works just fine. The steps you followed will establish M:N relate if there is an M:N cardinality between your table attributes. You don't have to specify the cardinality explicitly as you would when you create a relationship class. Refer screenshot of M:N relate i created on the fly.

Untitled.png

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RiyasDeen
Occasional Contributor III

Hi Tim,

On the fly M:N relate works just fine. The steps you followed will establish M:N relate if there is an M:N cardinality between your table attributes. You don't have to specify the cardinality explicitly as you would when you create a relationship class. Refer screenshot of M:N relate i created on the fly.

Untitled.png