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When i edit the query for a report i found that there are two setting for a specific data source. they are "JoinMode" and "Relations".
For "JoinMode", i'm pretty sure that i can understand. but for the "Relations", i'm a little bit confused.
I looked into some of the system queries, for some of the data source, if the setting for "JoinMode" is configured as "OutJoin", normally i found that the "Relations" is configured as "No".
Since the "OutJoin" is also one kind of relation, Why we have to configure the "Relations" as "No". does it has special meaning ?
The Microsoft official specification for "Relations" as below:
Determines if the query system should use the relations that are defined for tables and extended data types.
If set to Yes, the query is automatically updated if a relation is changed.
If we configure the "Relations" as "No", and the "JoinMode" as "OutJoin", i think the system also use the relations that are defined for tables and extended data types, right ?
The Form also have the data sources, we control the relations by configure the form data source's "LinkType", and we don't have to configure the relations, is there any difference between the form data source and query data source ?
Please correct me.
many thanks.
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