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Update lookup-transformation.md #9721

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2 changes: 2 additions & 0 deletions docs/integration-services/data-flow/transformations/lookup-transformation.md
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Expand Up @@ -28,6 +28,8 @@ helpviewer_keywords:

The Lookup transformation performs lookups by joining data in input columns with columns in a reference dataset. You use the lookup to access additional information in a related table that is based on values in common columns.

The Lookup component compares each input row in a data stream with column values specified in a lookup table. If a match is found as a result of the comparison, the Lookup component adds the data from the columns in the reference table to the input row and combines them.

The reference dataset can be a cache file, an existing table or view, a new table, or the result of an SQL query. The Lookup transformation uses either an OLE DB connection manager or a Cache connection manager to connect to the reference dataset. For more information, see [OLE DB Connection Manager](../../../integration-services/connection-manager/ole-db-connection-manager.md) and [Cache Connection Manager](../../connection-manager/cache-connection-manager.md)

You can configure the Lookup transformation in the following ways:
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