DAO mode reading and writing database

Function definition

The function uses DAO design pattern, not [ActiveRecord design pattern](https://www.martinfowler.com/eaaCatalog/ activeRecord.html).

Example

The following code is an example of inserting a piece of data into the account table of the passport library:

account = {
     "username": "luwak_fans",
     "email": "luwak_fans@api.tech"
}

luwak.dao("passport.account.add", account)

passport.account.add where:

• passport is the database name
• account is the table name
• add is the operation type