Query tweater (4)
There are also dedicated SQL functions that you can use in the WHERE clause of an SQL query. For example, CHAR_LENGTH() returns the number of characters in a string.
Cet exercice fait partie du cours
<cours>Intermediate Importing Data in R</cours>Instructions de l’exercice
- Create a data frame,
short, that selects theidandnamecolumns from theuserstable where the number of characters in thenameis strictly less than 5. - Print
short.
Exercice interactif pratique
Essayez cet exercice en complétant ce code d’exemple.
# 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 data frame short
# Print short