Notion Database Accounting: How to Automatically Update Account Balances

Problem Background

Below is a simple accounting module. We want the "My Asset Distribution" database to display the latest balance for each account in real time.

The core requirement is straightforward: After adding a new monthly record, the "Latest Balance" for each account should update automatically — no manual changes needed.

Solution Approach

The entire solution consists of three steps:

1. Use a Relation to link monthly records to asset accounts
2. Use a Formula function to automatically read the balance from the related record
3. Leverage the Relation's "Limit to 1 page" feature to ensure only the latest record is displayed

Step 1: Create a Relation

First, link the latest month's page (e.g., "March") to all asset accounts via a Relation.

Step 2: Write a Formula

Next, add a Formula property to display the latest balance for each account.

Here's a breakdown of the formula logic:

Using lets() to define variables:

• zfb: The Alipay balance from the currently related month
• zsyh: The China Merchants Bank balance from the currently related month

Using ifs() for conditional logic:

• If the current row's name is "Alipay," return the value of zfb
• If the current row's name is "China Merchants Bank," return the value of zsyh

Step 3: Limit the Relation to One Page

At this point, you might wonder: if you add an April record, won't the latest balance show two values?

The fix is simple — enable "Limit to 1 page" on the Relation property:

This way, when you add an April record and link it to the asset accounts, the March relation is automatically removed. The asset account always links to only the most recent record, so the balance is always up to date.

As shown below, simply press Ctrl+D to duplicate the "March" record, and the previous record's relation is automatically cleared:

Summary

The key technique in this solution is the Relation's "Limit to 1 page" feature — it ensures the database always links to only the latest record. Combined with a Formula function, this enables automatic balance updates.

This logic can be reused in any scenario where you need to display only the most recent related record — such as a project's latest status, a client's most recent contact record, and more.

---