Answered: What is the balance (total across all…

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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For the below `bank' schema: customer(customerid,username,fname,lname,street1,street2,city,state,zip) account(accountid,customerid,description,) transaction(transactionid,trantimestamp,accountid,amount) A customer may have several accounts, and each account may participate in many transactions. Each transaction will have at least two records, one deducting amount from an account, and one adding amount to an account (for a single transactionid, the sum of amounts will equal zero). Using SQL, answer this question (write a SQL query that answers this questions): 5. What is the balance (total across all accounts) for customerid=42?

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