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SQL for Multiple Accounts No Recent Activity
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SQL for Multiple Accounts No Recent Activity

MediumSQL · PostgreSQL

Problem

How do you write SQL to identify customers with multiple account types and no recent transactions at PNC Financial Services Group? Assume only active accounts and completed transactions qualify. Treat the 90 days before April 1, 2025 as the recent period.

Output

  1. One row per qualifying customer.
  2. Include customer_id, customer_name, account_type_count, and last_completed_transaction_date.
  3. Sort by customer_id ascending.

Schema

customers
ColumnTypeDescription
customer_idPKINTUnique customer identifier
customer_nameVARCHAR(100)Customer full name
accounts
ColumnTypeDescription
account_idPKINTUnique account identifier
customer_idINTOwning customer
account_typeVARCHAR(30)Type of financial account
account_statusVARCHAR(20)Current account status
transactions
ColumnTypeDescription
transaction_idPKINTUnique transaction identifier
account_idINTAccount associated with the transaction
transaction_dateDATEDate the transaction occurred
transaction_statusVARCHAR(20)Processing status of the transaction
amountNUMERIC(12,2)Transaction amount
Tablescustomersaccountstransactions
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