Explain the Table Calculation Function 'SIZE' in Tableau with Example?

 The SIZE function in Tableau is a table calculation function that returns the number of data points or rows in a specified partition or window. It provides the size or count of the data within the defined scope.

The syntax for the SIZE function in Tableau is as follows:

SIZE()

Here's an example to demonstrate how to use the SIZE function in Tableau:

Suppose you have a dataset that contains information about customer orders. You want to calculate the number of orders placed by each customer.

1. Open Tableau and connect to your dataset.
2. Create a view that includes the "Customer" field and any other relevant fields such as "Order ID" or "Order Date."
3. Right-click on the view and select "Add Table Calculation."
4. In the Calculation Type drop-down, select "Size."
5. In the "Compute Using" section, choose the appropriate dimensions to define the partitioning and addressing for the calculation (e.g., "Customer").
6. Click "OK" to apply the table calculation.

Tableau will calculate the size of each partition, which represents the number of orders placed by each customer.

You can further customize the view, apply sorting, or add additional calculations based on the size. For example, you can create a visualization that shows the number of orders per customer, identify customers with the highest or lowest number of orders, or compare the order count across different product categories.

The SIZE function allows you to determine the size or count of data points within a specific partition or window. It helps you understand the quantity or extent of the data within the defined scope and supports various data analysis and visualization scenarios.