How can I design data access classes with strategy pattern in C#?

I'm applying strategy design pattern for data access mechanism. I have a technology-independent interface;

public interface IMyEntityDal
{
    MyEntity Get();
    bool Insert(MyEntity myEntity);
    void Delete();
}

And I have 2 concrete data access class that inherit from IMyEntityDal interface.

public class SqlMyEntityDal : IMyEntityDal
{
    MyEntity Get()
    {
        //some ef or ado.net code...
    }

    bool Insert(MyEntity myEntity)
    {
        //this method is not usable for this concrete class.
    }
    
    void Delete(MyEntity myEntity)
    {
        //some ef or ado.net code...
    }
}

public class OracleMyEntityDal : IMyEntityDal
{
    MyEntity Get()
    {
        //this method is not usable for this concrete class.
    }

    bool Insert(MyEntity myEntity)
    {
        //some oracle specific code...
    }

    void Delete(MyEntity myEntity)
    {
        //some oracle specific code...
    }
}

The client that using IMyEntityDal doesn't know about IMyEntityDal implementation(Sql or Oracle). It injects concrete class with constructor.

public class Client
{
    private IMyEntityDal _myEntityDal;
    public Client(IMyEntityDal myEntityDal)
    {
        _myEntityDal = myEntityDal;
    }

    public void Do()
    {
        var myEntity = _myEntityDal.Get();
        _myEntityDal.Insert(myEntity);
    }
    
    public void DeleteMyEntity(MyEntity myEntity)
    {
        _myEntity.Delete(myEntity);
}

I want to get MyEntity object from SQL and insert to ORACLE database. I don't want to implement Insert(MyEntity myEntity) method for SqlMyEntityDal concrete class. And I don't want to implement Get() method for OracleMyEntityDal concrete class. Also I want to implement Delete(MyEntity myEntity) method for either two classes. In this situation, I can choose the concrete class for Delete() method with constructor injection. But Client is getting and inserting with same database. How can i design this mechanism?