# Column Summaries

The Column Summary feature in Noloco allows you to add a summary to any numeric column in your table layout (Grid or Table). This feature is particularly useful for quickly calculating and displaying key data metrics like totals, averages, and more.

### **Use Cases**

* **Financial Tables**: Calculate the total sum of invoice amounts.
* **Sales Data**: Determine the average sales per item.
* **Inventory Management**: Find the maximum or minimum stock levels.

### **Steps to Add a Column Summary**

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1. **Navigate to Your Table**
2. **Enable Build Mode**

   Activate build mode from the Build Mode Toolbar. This allows you to make changes to your table layout.
3. **Open the Field Settings** Locate the numeric field (column) you want to summarize and open its field settings.
4. **Select Your Desired Summary**

   Choose the type of summary you wish to display from the following options:

   * **Count**: Number of non-empty items in the column.
   * **Sum**: Total sum of all numeric values in the column.
   * **Maximum**: Highest value in the column.
   * **Minimum**: Lowest value in the column.
   * **Average**: Average of all numeric values in the column.

### Examples of Column Summaries

* **Example 1: Summing Invoice Amounts**
  * **Use Case**: In a financial table, add a Sum summary to the 'Invoice Amount' column to see the total amount across all invoices.
* **Example 2: Calculating Average Sales**
  * **Use Case**: In a sales table, use the Average summary on the 'Units Sold' column to understand the average sales per item.
* **Example 3: Finding Maximum Stock Level**
  * **Use Case**: In an inventory table, apply a Maximum summary to the 'Stock Level' column to identify the item with the highest stock.

### **Grouped Table Summaries**

When your table is grouped by one or more categories (e.g., by product type, region, etc.), the summaries will be calculated for each group separately, providing detailed insights per category.