Hostname root prefix (rootprefix)

[ 1 Description ] [ 2 How does it work in the search window? ] [ 3 How does it work in LINQ? ]

Description

Extract the root prefix from the hostnames in a given string field. A root prefix includes everything that comes before the root domain, including it. For example, in www.my.example.co.uk, the root prefix is www.my.example

How does it work in the search window?

Select Create field in the search window toolbar, then select the Hostname root prefix operation. You need to specify one argument:

Argument	Data type

Argument	Data type
Hostname ^mandatory	string

The data type of the values in the new column is string.

Example

In the my.upload.sample.data table, we want to get the root prefixes of the hostnames in our Hostnames field. To do it, we will create a new field using the Hostname root prefix operation.

The arguments needed to create the new field are:

Hostname - Hostnames field

Click Create field and you will see the following result:

How does it work in LINQ?

Use the operator select... as... and add the operation syntax to create the new column. This is the syntax for the Hostname root prefix operation:

rootprefix(string)

Example

You can copy the following LINQ script and try the above example on the my.upload.sample.data table. As said above, keep in mind that you must download the CSV file above.

from my.upload.sample.data
select split(message, ";", 15) as Hostnames
select rootprefix(Hostnames) as root_prefix