Searching data / Building a query / Operations reference / String group / Hostname root domain (rootdomain)
Hostname root domain (rootdomain)
Description
Extracts the root domain from the hostnames in a given string field.
The root domain (example.com) is the overarching structure that contains the subdomains (blog.example.com), and every folder that belongs to a website. The root domain is the site name that you need to buy or register with a TLD extension.
How does it work in the search window?
Select Create column in the search window toolbar, then select the Hostname root domain operation. You need to specify one argument:
| Argument | Data type |
|---|---|
| Hostname (mandatory) | string |
The data type of the values in the new column is string.
Example
This example is performed in a data table generated from this lookup file.
You must download the file and upload it as a lookup (name the lookup table hostnames). Then, you can access it from the Finder, selecting my → lookuplist → hostnames. Learn more in Upload a lookup table.
In the my.lookuplist.hostnames table, we want to get the root domains of the hostnames in our Hostnames column. To do it, we will create a new column using the Hostname root domain operation.
The arguments needed to create the new column are:
- Hostname - Hostnames column
Click Create column 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 domain operation:
rootdomain(string)
Example
You can copy the following LINQ script and try the above example on the my.lookuplist.hostnames table. As said above, keep in mind that you must download and upload this lookup file to your Devo domain.
from my.lookuplist.hostnames
select rootdomain(Hostnames) as root_domains