Write a query that Balance of each CUSTOMER who have made purchase(s) before AND subtotal that each customer purchased. So that we can find the ENDING balance.  Output: CUS_CODE SUBTOTAL CUS_BALANCE ENDING_BALANCE 10010 0 0 0 10011 444.15 0 444.15 10012 154 346 500 10013 0 537 537 10014 422.87 0 422.87 10015 34.99 0 34.99 10016 0 221 221 10017 0 769 769 10018 70.44 217 287.44 10019 0 0 0

A Guide to SQL
9th Edition
ISBN:9781111527273
Author:Philip J. Pratt
Publisher:Philip J. Pratt
Chapter5: Multiple-table Queries
Section: Chapter Questions
Problem 7CAT: Repeat Exercise 6, but this time use the EXISTS operator in your query.
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Write a query that Balance of each CUSTOMER who have made purchase(s) before AND subtotal that each customer purchased. So that we can find the ENDING balance. 

Output:

CUS_CODE SUBTOTAL CUS_BALANCE ENDING_BALANCE
10010 0 0 0
10011 444.15 0 444.15
10012 154 346 500
10013 0 537 537
10014 422.87 0 422.87
10015 34.99 0 34.99
10016 0 221 221
10017 0 769 769
10018 70.44 217 287.44
10019 0 0 0
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ISBN:
9781111527273
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Course Technology Ptr