BrowserId, from (select distinct BrowserId from PageViews order by random() limit 100000 ) list join PageViews pv on list. The query was close to the overall average performance advantage that Azure SQL DW had over Redshift in the queries (1.57 to 1.67 times faster). Query 10 uniquely has a Sum and a Top/Limit. In Query 9 (sub-select and a sum operation) Azure SQL DW’s performance was roughly twice as fast.As you will see the final resultsets will differ, but there is some interesting info on how SQL Server actually completes the process. Let's take a look at a few simple examples of how these commands work and how they differ. GitHub Gist: instantly share code, notes, and snippets.
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