Write an SQL query to extract the answer directly.
Chapter4: Constraints
Section: Chapter Questions
Problem 8HOA: Create a table named REP_CONTRACTS containing the columns listed in the following chart A composite...
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Question
Write an SQL query to extract the answer directly.
![Tables
patient
Columns
PatientID
Gender
Age
Indexes
Foreign Keys
Triggers
visit
Columns
VisitID
PatientID
VisitReason
Urgency
ArrivalMode
HospAdmit
Cost
Arrivaldate
Dischargedate
Indexes
Foreign Keys
Triggers](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe8b72512-0a51-4568-8fb3-5ec320d71f77%2F9ccbd2cc-1e8f-45b4-98a6-6a79469580fc%2Fljy1i9o_processed.png&w=3840&q=75)
Transcribed Image Text:Tables
patient
Columns
PatientID
Gender
Age
Indexes
Foreign Keys
Triggers
visit
Columns
VisitID
PatientID
VisitReason
Urgency
ArrivalMode
HospAdmit
Cost
Arrivaldate
Dischargedate
Indexes
Foreign Keys
Triggers
![What is the difference between (1) the maximum cost of all highest urgency ER visits and (2) the
maximum cost of all lowest urgency ER visits? Name the difference as urgency_diffcost.
The result table should contain only one row and one column.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe8b72512-0a51-4568-8fb3-5ec320d71f77%2F9ccbd2cc-1e8f-45b4-98a6-6a79469580fc%2F72hucnh_processed.png&w=3840&q=75)
Transcribed Image Text:What is the difference between (1) the maximum cost of all highest urgency ER visits and (2) the
maximum cost of all lowest urgency ER visits? Name the difference as urgency_diffcost.
The result table should contain only one row and one column.
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