Github user gatorsmile commented on the pull request: https://github.com/apache/spark/pull/10630#issuecomment-169757412 Also did a research in the SQL standard. Below is the SQL2003 Syntax ``` <SELECT statement1> INTERSECT [ALL | DISTINCT] [CORRESPONDING [BY (column1, column2, ...)]] <SELECT statement2> INTERSECT [ALL | DISTINCT] [CORRESPONDING [BY (column1, column2, ...)]] ... ```
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