Program or script to create automated pages

WordPress experts

I have a database which has 2000 items. I would like to
a) create a page for each item
b) Create a page comparing two items. With 2000 items I can create thousands of pages.

I am from java programming background so my solution was to write code which will fetch all the items from the database
a) run in a loop and create the pages
b) run two loops and pass in if of items. Code will fetch details and create the pages.

My questions
Is the right way to go create searchable, SEO friendly page for each item ?
Where do I create the code to execute the desired functionality ? Will it be a plugin or function or a script ? I will like to create 300 or 400 pages only at one time. I can control this by changing limits in code.

Thanks in advance