text: Title: Model stored/encoded as a delimited string in the database?
  Body: ### First Check
  
  - [X] I added a very descriptive title to this issue.
  - [X] I used the GitHub search to find a similar issue and didn't find it.
  - [X] I searched the SQLModel documentation, with the integrated search.
  - [X] I already searched in Google "How to X in SQLModel" and didn't find any information.
  - [X] I already read and followed all the tutorial in the docs and didn't find an answer.
  - [X] I already checked if it is not related to SQLModel but to [Pydantic](https://github.com/samuelcolvin/pydantic).
  - [X] I already checked if it is not related to SQLModel but to [SQLAlchemy](https://github.com/sqlalchemy/sqlalchemy).
  
  ### Commit to Help
  
  - [X] I commit to help with one of those options 👆
  
  ### Example Code
  
  ```python
  ActualData(BaseModel):
      id: int
      KnownName: str
      NickName: str
      Mother: str
      Father: str
      SocialSecurity: int
      Pets: Optional[boolean]
      Vegan: Optional[boolean]
  ```
  
  ```
  Database Schema:
      id: int
      name: str # KnownName
      details: str # f"KnownName={KnownName};NickName={NickName};Mother={Mother};Father={Father};SocialSecurity={SocialSecurity};Pets={Pets};Vegan={Vegan}"
  ```
  ```
  
  
  ### Description
  
  I have a very strange constraint, I am using SQLModel as my orm. I have a database with two important fields, for example `name` and `details`. The important information I need for my model `ActualData` is built from the `details` column from the database. 
  
  How do I use the `ActualData` model in my code, but when I submit/save/read from the database, it is encoded as a character delimited string structure? 
  
  [pydantic/validators](https://pydantic-docs.helpmanual.io/usage/validators/) was very helpful but it fills one field. Is it possible to fill out the entire model with one validator? How does one encode the model back to a single string within the database?
  
  ### Operating System
  
  Windows
  
  ### Operating System Details
  
  - win11 pro, python from windows store, pipenv
  
  ### SQLModel Version
  
  0.0.8
  
  ### Python Version
  
  3.10.8
  
  ### Additional Context
  
  Think of [storing the string components of postgresql database connection string](https://www.connectionstrings.com/postgresql/), but storing it as a completed connection string
  
  `User ID=root;Password=myPassword;Host=localhost;Port=5432;Database=myDataBase;Pooling=true;Min Pool Size=0;Max Pool Size=100;Connection Lifetime=0;`