After you finish converting entities in mike physical ERD into tables, it's necessary to evaluate where to apply unique indexes. in what case is it necessary to create unique indexes as constraints?
To improve query performance on tables with a lot of rows.
To enforce uniqueness on tables with surrogate primary keys
Unique indexes provide additional information helpful to the query optimizer.
Query optimizer uses this information to produce more efficient execution plans.
Unique index constarints are necessary to improve query performance on tables with a lot of rows
whereas surrogate primary key itself enforces uniqueness on tables. It identifies each rows of the table uniquley. No additional unique index constraint is needed for this.
After you finish converting entities in mike physical ERD into tables, it's necessary to evaluate where...
I need help with my very last assignment of this term
PLEASE!!, and here are the instructions: After reading Chapter Two,
“Keys to Successful IT Governance,” from Roger Kroft and Guy
Scalzi’s book entitled, IT Governance in Hospitals and Health
Systems, please refer to the following assignment instructions
below.
This chapter consists of interviews with executives
identifying mistakes that are made when governing healthcare
information technology (IT). The chapter is broken down into
subheadings listing areas of importance to understand...
How can we assess whether a project is a success or a
failure?
This case presents two phases of a large business transformation project involving the implementation of an ERP system with the aim of creating an integrated company. The case illustrates some of the challenges associated with integration. It also presents the obstacles facing companies that undertake projects involving large information technology projects. Bombardier and Its Environment Joseph-Armand Bombardier was 15 years old when he built his first snowmobile...