mysql = require('mysql')
c = mysql.new()
ok, err = c:connect({ host = '127.0.0.1', port = 3306, database = 'test', user = 'user', password = 'pass' })
if ok then
  res, err = c:query('SELECT * FROM mytable LIMIT 2')
  dump(res)
end

mysql = require('mysql')
c = mysql.new()
ok, err = c:connect('postgres://host=127.0.0.1 port=5432 user=user password=123456 dbname=foo sslmode=disable')
if ok then
  res, err = c:query('SELECT * FROM mytable LIMIT 2')
  dump(res)
end

sqlite3 = require('sqlite3')
c = sqlite3.new()
ok, err = c:open('test.db', { cache = 'shared' })
if ok then
  res, err = c:query('SELECT * FROM mytable LIMIT 2')
  dump(res)
end