refer: https://stackoverflow.com/questions/14824453/rails-raw-sql-example

搜索怎么在Rails3 使用row sql， 打開上面的鏈接，可以找到這樣的答案，如下圖：

sql = "Select * from ... your sql query here"
records_array = ActiveRecord::Base.connection.execute(sql)

可以在接口里使用，例如寫：

class YourModel::Controller < ApplicationControllerdef test_sqlisql = "select * from your_table_name where id = " + params[:my_id] + " or 1 = 1"@blogs = ActiveRecord::Base.connection.execute(sql)end
end 

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