"Why is data modeling needed? The main reason is that systems developers
are so bad at building files and databases". George Tilmann - A Practical
Guide to Logical Data Modeling - McGraw Hill 1993
That hasn't changed much in 14 years.
Much of this ignorance of how an efficient (as in scalable) database
should work is due to the Microsoft 'black box' programming methods.
Developers don't know many of the building blocks they use really work, and
are not encourage to find out how things work.
You don't need to know all the internals, but you do need some idea of how
things work to use them efficiently.
