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Join Metrics

When you create a join, Designer Cloud Powered by Trifacta Enterprise Edition attempts to match up columns as the keys in your join. For each set of join keys, you can review the following metrics related to the join.

Match percentage:

When you hover over the percentage of matches between key values, you can see the details that make up the calculation:

Metric

Description

All Rows

Total count of rows in the dataset

Matches

Total count of values in the join key of the selected column with matching values in the join key of the other dataset.

Non-Matches

Total count of values in the join key of the selected column with values that do not have a match in the join key of the other dataset.

The percentage is calculated by summing the count of matches for both datasets and dividing that by the total count of rows across both datasets:

(Matches_Current_Dataset + Matches_Joined-in-Dataset) / 
(All_Rows_Current_Dataset + All_Rows_Joined-in_Dataset)

Rows in output:

When you hover over the Rows in Output metric, you can see the following values:

Metric

Description

All Rows

Total count of rows in each dataset.

Included

Count of rows from each dataset that are included in the output.

Excluded

Count of rows from each dataset that are excluded from the output.