You want to designate a unique index on the vehicle_id and VIN columns because together they filter on the joining column with the highest cardinality (or degree of uniqueness). Write the syntax to add a unique index on the vehicle_id and VIN columns triggered by joins on the surrogate key column?
You want to designate a unique index on the vehicle_id and VIN columns because together they filter on the joining column with the highest cardinality (or degree of uniqueness). Write the syntax to add a unique index on the vehicle_id and VIN columns triggered by joins on the surrogate key column?
Chapter3: Creating Tables
Section: Chapter Questions
Problem 7SCG: The SERVICE_REQUEST table uses the CHAR data type for the DESCRIPTION and STATUS fields. Is there an...
Related questions
Question
Assume you have a vehicle table with a surrogate key vehicle_id column and VIN (Vehicle Identification Number) column and some other columns. You want to designate a unique index on the vehicle_id and VIN columns because together they filter on the joining column with the highest cardinality (or degree of uniqueness). Write the syntax to add a unique index on the vehicle_id and VIN columns triggered by joins on the surrogate key column?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Recommended textbooks for you
A Guide to SQL
Computer Science
ISBN:
9781111527273
Author:
Philip J. Pratt
Publisher:
Course Technology Ptr
Np Ms Office 365/Excel 2016 I Ntermed
Computer Science
ISBN:
9781337508841
Author:
Carey
Publisher:
Cengage
A Guide to SQL
Computer Science
ISBN:
9781111527273
Author:
Philip J. Pratt
Publisher:
Course Technology Ptr
Np Ms Office 365/Excel 2016 I Ntermed
Computer Science
ISBN:
9781337508841
Author:
Carey
Publisher:
Cengage