Joining 3 different datasets to match zip codes

jrtomici

Hi, I have 3 datasets each with a column containing zip codes. I want to use ETL to create a new dataset with 3 columns, all containing the zip codes from each input lined up.

Input:

Dataset 1        Dataset 2        Dataset 3
1                2                1
2                3                3
3                5                4
4                6                5

Output:

D1  D2  D3
1       1
2   2
3   3   3
4       4
    5   5
    6

Thank you

GrantSmith

You'll likely need to coalesce your dataset1 zip code and dataset2 zip code into a new field using a formula tile and then use that to join your dataset 3 zip code. This way it will pull in zip codes that don't exist in dataset1

COALESCE(`dataset1.zip`, `dataset2.zip`)

GrantSmith

You can use two join tiles with a full outer join to do this. Join tables 1 and 2 together then join the output of that to table 3 via an outer join.

jrtomici

What would the join key be for the second join tile?

GrantSmith

You'll likely need to coalesce your dataset1 zip code and dataset2 zip code into a new field using a formula tile and then use that to join your dataset 3 zip code. This way it will pull in zip codes that don't exist in dataset1

COALESCE(`dataset1.zip`, `dataset2.zip`)

jrtomici

Incredibly helpful, thank you.