mysql:
  host: host
  database: database
  user: user
  password: password
  port: 3306
postgresql:
  host: host
  database: database
  user: user
  password: password
  port: 80
  table_group: "数据表的组"
  data_from: "" # 内部表和外部表的拼接字段，没有可为空