What's the database design or business logic for creating an app for messaging between users? I am having difficulties with choosing how to approach the relationship between each Conversation of User ...
I am working on a web application which operate with different types of objects such as user, profiles, pages etc. All objects have unique object_id. When objects interact it may produce "activity", ...
I have a PBF file that contains the following information about a country: Nodes, each with their own longitude, latitude and properties; used to store points in a 2D space. Ways, each with their ...
I have a structure for storing item properties on SQL Server: ItemId PropertyId Value 1 1 a 1 2 b 2 1 a 2 2 5 Currently there are over 130000 ...