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5. Add a column to the query described in exercise 2 that uses the RANK() function to return a column named BalanceRank that ranks the balance due in descending order.

5. Add a column to the query described in exercise 2 that uses the RANK() function to return a column named BalanceRank that ranks the balance due in descending order.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Answer question 5

Exercises 1. Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those vendors in the 559 area code. Sort the result set by first name, then last name. 2. Write a SELECT statement that returns the InvoiceNumber and balance due for every invoice with a non-zero balance and an InvoiceDueDate that's less than 30 days from today. 3. Modify the search expression for InvoiceDueDate from the solution for exercise 2. Rather than 30 days from today, return invoices due before the last day of the current month. 4. Write a summary query that uses the CUBE operator to return LineItemSum (which is the sum of InvoiceLineItemAmount) grouped by Account (an alias for AccountDescription) and State (an alias for VendorState). Use the CASE and GROUPING function to substitute the literal value **ALL*" for the summary rows with null values. 5. Add a column to the query described in exercise 2 that uses the RANK() function to return a column named BalanceRank that ranks the balance due in descending order.
Transcribed Image Text:Exercises 1. Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those vendors in the 559 area code. Sort the result set by first name, then last name. 2. Write a SELECT statement that returns the InvoiceNumber and balance due for every invoice with a non-zero balance and an InvoiceDueDate that's less than 30 days from today. 3. Modify the search expression for InvoiceDueDate from the solution for exercise 2. Rather than 30 days from today, return invoices due before the last day of the current month. 4. Write a summary query that uses the CUBE operator to return LineItemSum (which is the sum of InvoiceLineItemAmount) grouped by Account (an alias for AccountDescription) and State (an alias for VendorState). Use the CASE and GROUPING function to substitute the literal value **ALL*" for the summary rows with null values. 5. Add a column to the query described in exercise 2 that uses the RANK() function to return a column named BalanceRank that ranks the balance due in descending order.
Step 2 Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those SQL server Code: select VendorContactFName +''+left (VendorContactLName,1)+"\ as Contact, RIGHT(VendorPhone, 8) as Phone from Vendors where substring(vendorphone,2,3)=559 order by VendorContactFName, VendorContactLName; Explanation: • The first column, Contact, is the vendorcontactname in this format • The second column, Phone, is the VendorPhone column without the area code. The 4th line makes sure that it only return rows for those vendors in the 559 area code. The last line sort the result set by first name, then last name. • CodeScreenShot select Vendor Contact FName + +left (Vendor Contact LName, 1) as Contact, RIGHT (Vendor Phone, 8) as Phone from Vendors where substring (vendorphone,2,3)=559 order by VendorContact FName, Vendor Contact LName;
Transcribed Image Text:Step 2 Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those SQL server Code: select VendorContactFName +''+left (VendorContactLName,1)+"\ as Contact, RIGHT(VendorPhone, 8) as Phone from Vendors where substring(vendorphone,2,3)=559 order by VendorContactFName, VendorContactLName; Explanation: • The first column, Contact, is the vendorcontactname in this format • The second column, Phone, is the VendorPhone column without the area code. The 4th line makes sure that it only return rows for those vendors in the 559 area code. The last line sort the result set by first name, then last name. • CodeScreenShot select Vendor Contact FName + +left (Vendor Contact LName, 1) as Contact, RIGHT (Vendor Phone, 8) as Phone from Vendors where substring (vendorphone,2,3)=559 order by VendorContact FName, Vendor Contact LName;
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Exercises 1. Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those vendors in the 559 area code. Sort the result set by first name, then last name. 2. Write a SELECT statement that returns the InvoiceNumber and balance due for every invoice with a non-zero balance and an InvoiceDueDate that's less than 30 days from today. 3. Modify the search expression for InvoiceDueDate from the solution for exercise 2. Rather than 30 days from today, return invoices due before the last day of the current month. 4. Write a summary query that uses the CUBE operator to return LineItemSum (which is the sum of InvoiceLineItemAmount) grouped by Account (an alias for AccountDescription) and State (an alias for VendorState). Use the CASE and GROUPING function to substitute the literal value **ALL*" for the summary rows with null values. 5. Add a column to the query described in exercise 2 that uses the RANK() function to return a column named BalanceRank that ranks the balance due in descending order.
Transcribed Image Text:Exercises 1. Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those vendors in the 559 area code. Sort the result set by first name, then last name. 2. Write a SELECT statement that returns the InvoiceNumber and balance due for every invoice with a non-zero balance and an InvoiceDueDate that's less than 30 days from today. 3. Modify the search expression for InvoiceDueDate from the solution for exercise 2. Rather than 30 days from today, return invoices due before the last day of the current month. 4. Write a summary query that uses the CUBE operator to return LineItemSum (which is the sum of InvoiceLineItemAmount) grouped by Account (an alias for AccountDescription) and State (an alias for VendorState). Use the CASE and GROUPING function to substitute the literal value **ALL*" for the summary rows with null values. 5. Add a column to the query described in exercise 2 that uses the RANK() function to return a column named BalanceRank that ranks the balance due in descending order.
Step 2 Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those SQL server Code: select VendorContactFName +''+left (VendorContactLName,1)+"\ as Contact, RIGHT(VendorPhone, 8) as Phone from Vendors where substring(vendorphone,2,3)=559 order by VendorContactFName, VendorContactLName; Explanation: • The first column, Contact, is the vendorcontactname in this format • The second column, Phone, is the VendorPhone column without the area code. The 4th line makes sure that it only return rows for those vendors in the 559 area code. The last line sort the result set by first name, then last name. • CodeScreenShot select Vendor Contact FName + +left (Vendor Contact LName, 1) as Contact, RIGHT (Vendor Phone, 8) as Phone from Vendors where substring (vendorphone,2,3)=559 order by VendorContact FName, Vendor Contact LName;
Transcribed Image Text:Step 2 Write a SELECT statement that returns two columns based on the Vendors table. The first column, Contact, is the vendor contact name in this format: first name followed by last initial (for example, "John S.") The second column, Phone, is the VendorPhone column without the area code. Only return rows for those SQL server Code: select VendorContactFName +''+left (VendorContactLName,1)+"\ as Contact, RIGHT(VendorPhone, 8) as Phone from Vendors where substring(vendorphone,2,3)=559 order by VendorContactFName, VendorContactLName; Explanation: • The first column, Contact, is the vendorcontactname in this format • The second column, Phone, is the VendorPhone column without the area code. The 4th line makes sure that it only return rows for those vendors in the 559 area code. The last line sort the result set by first name, then last name. • CodeScreenShot select Vendor Contact FName + +left (Vendor Contact LName, 1) as Contact, RIGHT (Vendor Phone, 8) as Phone from Vendors where substring (vendorphone,2,3)=559 order by VendorContact FName, Vendor Contact LName;
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