This is the market place and MySQL that I was talking about
I was talking about wpmarketplaceplugin-com and wordpress-org-plugins-wpmarketplace. The MySQL database behind it, that my client uses, has following tables:
wpmarketcommentmeta
wpmarketcomments
wpmarketlinks
wpmarketmp_country
wpmarketmp_feture_products
wpmarketmp_order_items
wpmarketmp_orders
wpmarketmp_payment_methods
wpmarketmp_withdraws
wpmarketoptions
wpmarketpostmeta
wpmarketposts
wpmarketterm_relationships
wpmarketterm_taxonomy
wpmarketterms
wpmarketusemeta
wpmarketusers
So of the table names are obvious, such as "orders", "order_items", others are not, such as wpmarketusemeta. Because what client provided me was an empty database, I can't look at data and find out the nature of the tables and columns.
So some documentation on this schema will be very helpful!