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F75
Helper I
Helper I

Table Merge creates duplicate records - No duplicates in the source tables

Hi,

I am trying to understand why the merge operation table expansion create duplicates. There are no duplicates values of tables, 'Age-Event' in both tables. LEFT OUTER or INNER join has the same duplicate results?

Another issue is, unless i use 'Fuzzy search' option, Merge does not find common records.

 

Thanks

 

 Merge PowerBI.PNG

1 ACCEPTED SOLUTION
HotChilli
Super User
Super User

Not matching without fuzzy merge option - tells us the fields you observe as being the same are not. I think you need to focus on this first.  Hidden characters/spaces/some other data mismatch.  You're probably going to have to clean up the data.

 

Educated guess on the 'duplicates when fuzzy merge is on' -  Fuzzy merge works on 80% similarities (i think) and from looking at the picture you supplied, it's going to match up quite a few of those fields.

 

Edit- you can experiment with the fuzzy merge options to narrow the issue down e.g. set the match threshhold higher or set the 'ignore spaces' and other options

View solution in original post

2 REPLIES 2
HotChilli
Super User
Super User

Not matching without fuzzy merge option - tells us the fields you observe as being the same are not. I think you need to focus on this first.  Hidden characters/spaces/some other data mismatch.  You're probably going to have to clean up the data.

 

Educated guess on the 'duplicates when fuzzy merge is on' -  Fuzzy merge works on 80% similarities (i think) and from looking at the picture you supplied, it's going to match up quite a few of those fields.

 

Edit- you can experiment with the fuzzy merge options to narrow the issue down e.g. set the match threshhold higher or set the 'ignore spaces' and other options

View solution in original post

@HotChilli Yes there were some additional characters which caused this issue. Thanks.

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