Hi there, i have a problem defining my primary key...
I have a list of material (tools) that i manage. I want to be able to
track them (follow information that people enter) in the database. I
set my primary key to ID_Material but my question is?
If i send my tools twice to get fixe should i use this key or another
1 like.
Cuz if i use the id_material ans i want to send the tool twice it will
be double in my DB but with a different date.