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cannot merge a view that contains windowing functions

edited Feb 10, 2020 3:14PM in Database Tuning (MOSC) 3 commentsAnswered

The output of a SQL Tuning Analyzer run  gave the following reasons why a data warehouse merge statement had limited opportunity for tuning.

The optimizer cannot merge a view that contains windowing functions.

  The optimizer cannot merge a view that contains a group outer join.

  The optimizer cannot merge a view that contains a "WITH" clause.

  The optimizer cannot merge a view that contains a NO_MERGE hint.

Why use advanced analytics if they can't be tuned?

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