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Inactive Users in Last 30 Days
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Inactive Users in Last 30 Days

EasySQL · PostgreSQL

Problem

Given two tables, write a query to find users who haven't made a transaction in the last 30 days.

Use PostgreSQL's CURRENT_DATE as the reference date. Treat transactions from CURRENT_DATE - INTERVAL '30 days' through CURRENT_DATE as recent.

Output

  1. Return one row per user without a recent transaction.
  2. Include user_id and full_name.
  3. Order results by user_id ascending.

Schema

users
ColumnTypeDescription
user_idPKINTUnique identifier for a user
full_nameVARCHAR(150)User's display name
transactions
ColumnTypeDescription
transaction_idPKINTUnique identifier for a transaction
user_idINTUser who made the transaction
transaction_dateDATEDate on which the transaction occurred
amountNUMERIC(12,2)Transaction amount
Tablesuserstransactions
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