What is the best way to store bitarray (blob) for pasting in database?

[Suliman via Digitalmars-d-learn]

I have next task.
There is PostgreSQL DB. With field like: id, mydata.

mydata - is binary blob. It can be 10MB or even more.

I need load all data from PostgreSQL to SQLLite.

I decided ti create struct that and fill it with data. And then 
do INSERT operation in sqllite.

But I do not know is it's good way, and if it's ok what data type 
should I use for blob (binary data).

	struct MyData
	{
		string  id;
		string  mydata; // what datatype I should use here??
	}	

	MyData [] mydata;

	MyData md;


	while (rs.next())
	{

	 md.id = to!string(rs.getString(1));
	 md.mydata = to!string(rs.getString(2)); //??

	 mydata ~= md;
	}

....

stmtLite.executeUpdate(`insert into MySyncData(id,mydata) 
values(md.id,md.data)`); //ddbc driver
is it's normal way to insert data?