Rubyでmysqlにデータを読み書きする方法。
RubyでスクレイピングしたデータをDBに書き込みたいときなどに使えます。
require 'mysql2'
client = Mysql2::Client.new(host: 'localhost', username: 'root', password: '', database: 'db_name')
client.query("SQL文")
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