How to export a MySQL database to JSON?

Question

I am interested in exporting a subset of values from a MySQL database into a JSON-formatted file on disk.

I found a link that talks about a possible way to do this:

Answer 1

Use the following ruby code

require 'mysql2'

client = Mysql2::Client.new(
  :host => 'your_host', `enter code here`
  :database => 'your_database',
  :username => 'your_username', 
  :password => 'your_password')
table_sql = "show tables"
tables = client.query(table_sql, :as => :array)

open('_output.json', 'a') { |f|       
    tables.each do |table|
        sql = "select * from `#{table.first}`"
        res = client.query(sql, :as => :json)
        f.puts res.to_a.join(",") + "\n"
    end
}