BaşlayınÜcretsiz başlayın

Be polite and ...

Every time you connect to a database using dbConnect(), you're creating a new connection to the database you're referencing. RMySQL automatically specifies a maximum of open connections and closes some of the connections for you, but still: it's always polite to manually disconnect from the database afterwards. You do this with the dbDisconnect() function.

The code that connects you to the database is already available, can you finish the script?

Bu egzersiz, kursun bir parçasıdır

Intermediate Importing Data in R

Kursa Göz Atın

Egzersiz talimatları

  • Using the technique you prefer, build a data frame long_tweats. It selects the post and date columns from the observations in tweats where the character length of the post variable exceeds 40.
  • Print long_tweats.
  • Disconnect from the database by using dbDisconnect().

Uygulamalı etkileşimli egzersiz

Bu egzersizi bu örnek kodu tamamlayarak deneyin.

# Connect to the database
library(DBI)
con <- dbConnect(RMySQL::MySQL(),
                 dbname = "tweater",
                 host = "courses.csrrinzqubik.us-east-1.rds.amazonaws.com",
                 port = 3306,
                 user = "student",
                 password = "datacamp")

# Create the data frame  long_tweats


# Print long_tweats
print(long_tweats)

# Disconnect from the database
Kodu Düzenle ve Çalıştır