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PL/R Part 2: Functions that take arguments and the power of aggregation

(Leo Hsu and Regina Obe) In Intro to PL/R and R, we covered how to enable PL/R language in the database and wrote some PL/R functions that rendered plain text reports using the R environment. What makes combining R and PostgreSQL in PL/R most powerful is when you can start writing SQL summary querie

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