Consider Figure 8.20. a. Write a domain integrity rule for Balance. b. Write a triggering operation for
Question:
Consider Figure 8.20.
a. Write a domain integrity rule for Balance.
b. Write a triggering operation for the Balance attribute for the event of inserting a new.
Figure 8.20
Transcribed Image Text:
ACCOUNT Account Number Balance (al (bl (c) HH Is_for Uniqueness: Must be unique Null support: Non-null WITHDRAWAL Date Time Amount Name: Account Number Name: Amount Meaning: Customer account number in bank Meaning: Dollar amount of transaction Data type: Character Format: nnn-nnnn Data type: Numeric Format: 2 decimal places Range: 0-10,000 Uniqueness: Nonunique Null support: Non-null User rule: WITHDRAWAL Amount may not exceed ACCOUNT Balance Event: Insert Entity Name: WITHDRAWAL Condition: WITHDRAWAL Amount > ACCOUNT Balance Action: Reject the insert transaction
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Related Book For
Modern Systems Analysis And Design
ISBN: 9781292351629
9th Global Edition
Authors: Joe Valacich, Joey George
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