Add a Calculated Column

A calculated column is a way to manipulate the data in a dataset by defining a new column of data that presents the raw information of one or more columns in a more meaningful way for users or analysts. Calculated columns can be used to make the following types of changes and to present the results as a column for reporting.

• Data Transformation: When raw data is in a format that is not very meaningful for users, you can transform the format to a more meaningful value. For example, you could change a numeric date value like an epoch value into more human-readable date formats.

• Data Enrichment: Adding meaningful information to the data. For example, your event data might include an enumerated value for an application service. You could use a SQL statement to enrich that value from a service number to a more readable string value, such as “Company email application.”

• Data Validation: Correcting and validating data.

To add a calculated column:

1. Click the Calculated Columns tab.

2. Click Add Item to create a new entry for the column. Several fields appear. Note that the Is filterable and Is dimension fields are automatically selected.

3. In the Column header, click in the text and type a name for the column.

4. In the SQL Expression field, type a SQL expression for the new calculated field. This string also appears as a tooltip when a user hovers the cursor over the calculated column's "?" tooltip icon.

5. In the Label field, type a name for the calculated column. The label is the value that the end-users see in the user interface.

6. In the Description field, type a brief description of the calculated column. The description is also used as tooltip text when a user hovers the cursor over the calculated column's "i" tooltip icon.

7. In the Data Type field, select the data type for the calculated column’s value.

8. In the Datetime Format field, type the format of the date and time stamp in Python date time string format. Examples:

• %m-%d-%Y= 02-27-2020

• %a %d, %y = Tue 2, 2020

• %x %X = 02/27/2020 17:41:00

• %B-%Y = February-2020

• Epoch_m = If date is an epoch integer

9. Certified By and Certification Details are optional fields that provide some record keeping about the persons or teams that reviewed and certified a metric or column, its calculations, and data.

10. Click Save. The calculated column is added to the dataset.