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SQL Running Total Balances
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SQL Running Total Balances

MediumSQL · PostgreSQL

Problem

Write a SQL query to calculate a running total of daily balances by account for Crédit Agricole Cib.

Use the accounts and account_balances tables. Include accounts with balance records only, and calculate the cumulative total independently for each account.

Output

  1. One row per account and balance date.
  2. Columns: account_id, account_name, balance_date, daily_balance, and running_total.
  3. Sort by account_id, then balance_date ascending.

Schema

accounts
ColumnTypeDescription
account_idPKINTUnique account identifier
account_nameVARCHAR(120)Account holder or institutional account name
account_typeVARCHAR(30)Classification of the account
account_balances
ColumnTypeDescription
balance_idPKINTUnique balance record identifier
account_idINTReferenced account identifier
balance_dateDATEDate associated with the daily balance
daily_balanceNUMERIC(14,2)Balance amount recorded for the date
Tablesaccountsaccount_balances
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