Database Reference
In-Depth Information
APPENDIX A
Answers to Exercises
EXERCISE
1:
L
IFE WITHOUT
D
ATA
M
ODELING?
I do a lot of data modeling consulting assignments, and I frequently see issues with those
projects that skipped data modeling altogether or did just physical data modeling. Issues take
the form of data quality issues, integration issues with other applications, support issues,
and often communication issues between the business users/sponsor and IT. The project that
skipped modeling might have been done on time and within budget, but the long-term costs
can be staggering.
EXERCISE
2:
S
UBTYPING IN
M
ONGO
DB
ROLLDOWN
Author:
{ authorTaxID : “22-5555555”,
authorFirstName : “Steve”,
authorLastName : “Hoberman”
}
PrintVersion:
{ titleISBN : “9780977140060”,
authorTaxID : “22-5555555”,
