I've made this design similar to my problem, it's not exact but it close enough to understand my problem: http://i42.tinypic.com/bhbp5.jpg Some cellular client frequently send their GPS position and ...
Why do I need to have a primary key on my database for it to function correctly? In every tutorial I read, you need to make the id key the primary key. What does the primary key do differently than ...
Q: I use a serial as a datatype for my primary keys in my tables. I insert a lot of data then truncate these data one after one many times to test the data entry. My question is: Is there any ...