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Use this Snap to add a MINUS SQL operator to the separate queries coming from upstream Snaps. The MINUS SQL operator corresponds to ANSI EXCEPT. In Azure Synapse , and BigQuery, this Snap uses the EXCEPT operation unlike in Redshift and Snowflake, wherein where the Snap uses the MINUS operation. This Snap also allows you to preview the result of the MINUS SQL operation on the incoming SQL queries. You can validate the modified query using this preview functionality. 
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