You can configure the Match transformation to analyze data from one or two data sources. You select the ports from each data source when you define a strategy in the transformation.
When you configure the transformation to perform single-source analysis, you select one or more ports from a single data set. When you configure the transformation to perform dual-source analysis, you select one or more ports from each data set. You select the ports in pairs. For each pair of ports that you select, the transformation compares each value in one port with every value in the other port. If you perform single-source analysis on data from a single column, the transformation creates a temporary copy of the port that you select.
When you perform identity match analysis, you can compare a data source to a persistent index of identity data that you created in an earlier mapping. Use the
Match Type
options to specify identity analysis with a persistent index.
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