Forum Discussion
Unique values
Hi Experts!
I have two tables. One with dates and locations; One with dates and performance. I thought I could create a relationship between the dates, so I can see the Locations and Performance together.... but when I try to create that relationship it says "You can't create a relationship between these two columns because one of the columns must have unique values".
How do I do this?
I can hear the stampede of people coming to this post to promote Date tables.
Basically you want to create a central, unique set of dates that you can use to link the two tables and also do time intelligence as needed. Here's a similar post from a while ago:
in addition to J's post - that covers the technical side - - but you probably have a logical dilemma to resolve. If there are 2 date/locations:
1/1/16 London
1/1/16 NY
and 2 date/performances
1/1/16 Beethovan's Fifth
1/1/16 Nutcracker
then which goes with which? unless they always all go together.... in this example I invented you need a 3rd field in both tables, such as 'artist', then you could join on both date and artist fields to create a unique 1:1 relationship.
4 Replies
I can hear the stampede of people coming to this post to promote Date tables.
Basically you want to create a central, unique set of dates that you can use to link the two tables and also do time intelligence as needed. Here's a similar post from a while ago:
in addition to J's post - that covers the technical side - - but you probably have a logical dilemma to resolve. If there are 2 date/locations:
1/1/16 London
1/1/16 NY
and 2 date/performances
1/1/16 Beethovan's Fifth
1/1/16 Nutcracker
then which goes with which? unless they always all go together.... in this example I invented you need a 3rd field in both tables, such as 'artist', then you could join on both date and artist fields to create a unique 1:1 relationship.
Hi Experts! (not sure why the previous message didnt display!)
I have two tables. One with Dates and Locations; One with Dates and Performance. I want to create a relationship between the e but Im being told that "You cant create a relationship between these two columns because one of the columns must have unique values".
Any ideas why this is happening?
Hi!