Connettersi a un database

Importazione intermedia di dati in R

Filip Schouwenaars

Instructor, DataCamp

Finora

File di testo
File Excel

Database relazionali

Cos'è un database relazionale?
Come connettersi?
Come leggere una tabella?

company

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company

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company

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company

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company

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company

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company

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company

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Database Management System

DBMS
Open source
- MySQL, PostgreSQL, SQLite
Proprietari
- Oracle Database, Microsoft SQL Server
SQL = Structured Query Language

Database in R

Pacchetti R diversi
MySQL: RMySQL
PostgresSQL: RPostgresSQL
Oracle Database: ROracle
Convenzioni definite in DBI

install.packages("RMySQL")

library(DBI)   
# library(RMySQL) not required

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Connetti al database

con <- dbConnect(RMySQL::MySQL(), # Construct SQL driver
           dbname = "company",
           host = "courses.csrrinzqubik.us-
                            east-1.rds.amazonaws.com",
           port = 3306,
           user = "student",
           password = "datacamp")

con è un oggetto DBIConnection

Ayo berlatih!

Importazione intermedia di dati in R