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Reconcile Garmin Invoice Discrepancies

MediumSQL · PostgreSQL00:00
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Your question is Reconcile Garmin Invoice Discrepancies. Start with the requirements and the three tables on the right.

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Problem

Identify invoice-level discrepancies across Garmin invoice, payment, and customer tables. Return only problematic invoices and assign one issue label using this priority: invalid_customer > missing_payment > duplicate_payment > amount_mismatch.

Schema

garmin_customers
ColumnTypeDescription
customer_id
customer_name
status
garmin_invoices
ColumnTypeDescription
invoice_id
customer_id
invoice_date
invoice_amount
garmin_payments
ColumnTypeDescription
payment_id
invoice_id
payment_date
payment_amount

What This Tests

  • Joining fact and dimension tables
  • Aggregating payments to invoice level
  • Using a CTE for reconciliation logic
  • Applying CASE logic with issue priority
Tablesgarmin_customersgarmin_invoicesgarmin_payments
Your solutionPostgreSQL
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