CLIENT Client Nbr First Name Last Name Street City Prov State Postal Code Phone Email OWNS CLIENT_FK OWNS Client Nbr Account Nbr OWNS ACCOUNT FK TRANSACTION ACCOUNT FK TRANSACTION Tx Nbr Account Nbr Tx Type Code Tx Date Tx Amount Ref Nbr BANK BRANCH Branch Nbr Branch Name TX_TYPE_LOOKUP_FK MERCHANT Merchant Nbr Merchant Name ACCOUNT Account Nbr Balance TX_TYPE Tx Type Code Tx Type Descript
The National Bank of Erehwon handles money and maintains bank accounts on behalf of clients.
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A client is a person who does business with the bank.
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A client may have any number of accounts, and an account may belong to multiple clients (e.g., spouses, business partners).
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The client record is used for identification and contact data.
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For each account, the bank maintains the current balance on hand.
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Clients are identified by a five digit number starting with 10001.
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Accounts are identified by a seven digit number starting with 1000001.
When an account is first opened, its balance is set to zero. During the course of day-to-day business, Erehwon Bank applies transactions to accounts, including deposits, withdrawals, bill payments, and debit purchases or returns. For each transaction, the date and time, amount, and account are recorded, along with reference data applicable to that type of transaction:
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Deposits and withdrawals require the branch number to be recorded.
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Bill payments, and debit purchases or returns require the merchant number.
Building and Populating the Schema
Develop a
PL/SQL code
Code the PL/SQL module for each of the following:
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Trigger to enforce the referential integrity for the Transaction Ref_Nbr:
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Deposit or Withdrawal transaction to Bank Branch
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Bill Payment, Debit Purchase, or Return transaction to Merchant
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Step by step
Solved in 3 steps
