Periscope Data Blog

Sisense delivers AI-powered embedded analytics to unlock insights and convert data into revenue with pro-code, low-code, and no-code flexibility

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Software Engineering 1 Databases & Data 1

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Use SQL subqueries to count distinct 50x faster

2014289 points98 comments Databases & Data details

NB: These techniques are universal, but for syntax we chose Postgres. Thanks to the inimitable pgAdminIII for the Explain graphics. So useful, yet so slow