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@toyeiei
Created February 5, 2019 07:06
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# join two tables and select all columns
sqldf("SELECT * FROM mtcars
JOIN customers
ON mtcars.ID = customers.ID;")
# join two tables and select some columns
sqldf("SELECT c.ID, m.models, m.mpg, c.year FROM mtcars m
JOIN customers c
ON c.ID = m.ID;")
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