Adding documentation for DataSource NewRelic

src/pages/kb/data-sources/newrelic.md

@@ -0,0 +1,39 @@
+---
+category: querying
+parent_category: data-sources
+title: NewRelic
+slug: newrelic-ds
+---
+
+# Setup
+
+You need an **[Account ID](https://docs.newrelic.com/docs/accounts/accounts-billing/account-structure/account-id/)** provided by NewRelic, **[User API Token](https://docs.newrelic.com/docs/apis/intro-apis/new-relic-api-keys/)** and **[NewRelic GraphQL API URL](https://docs.newrelic.com/docs/apis/nerdgraph/get-started/introduction-new-relic-nerdgraph/)** to connect to NewRelic GraphQL API. The token behaves like a password. 
+
+
+{% callout warning %}
+
+This query runner only support **count** and **comparison** queries
+
+{% endcallout %}
+
+![](/assets/images/docs/gitbook/newrelic-setup.png)
+
+# Querying
+
+For a simple count query, one that returns single result:
+
+```
+{
+	"queryType": "count",
+	"nrql": "SELECT count(*) FROM Transactions"
+}
+```
+
+For a comparison query, one that returns two results (current and previous)
+
+```
+{
+	"queryType": "comparison",
+	"nrql": "SELECT count(*) FROM Transactions COMPARE WITH 1 day ago"
+}
+```