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Creating a relationship in Access
Does anyone know why when you create a one-to-many relationship between 2
tables the line between them in the graphic does not show the 1-to-infinity symbols unless you enforce referential integrity? Referential integrity has no relation to the type of relationship between tables as far as I know. It's always been like that in Access. |
#2
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Creating a relationship in Access
Seems reasonable to omit the 1 and infinity symbols as a way of indicating a
relationship without RI in a diagramatic way. A relationship without RI is nothing more than a line drawn between 2 tables. You may be able to determine if it is a one-to-many if there is a unique index on one side of the relationship, but there is no guarantee that you will leave that index there tomorrow. It is not a defined relationship at all: merely a hint about where you might like the join line when you create a query with the 2 tables. -- Allen Browne - Microsoft MVP. Perth, Western Australia Tips for Access users - http://allenbrowne.com/tips.html Reply to group, rather than allenbrowne at mvps dot org. "Tom" wrote in message ... Does anyone know why when you create a one-to-many relationship between 2 tables the line between them in the graphic does not show the 1-to-infinity symbols unless you enforce referential integrity? Referential integrity has no relation to the type of relationship between tables as far as I know. It's always been like that in Access. |
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