I'm working on a web app, and it part of it, there is a very simple database-driven file/document manager. As a file manager, there is the possibility of sub-folders. So in the DB, I have the ...

MySQL table primary keys and unique indexes prevent multiple rows with the same index from being added to the table. If you try to insert a duplicate row with a ...

Which makes for a better primary key: natural data points or meaningless values? Database developers have strong opinions on this facet of primary key design. This article settles the debate once and ...