docs: add documentation for the cdf functionality in Service Levels

website/docs/r/service_level.html.markdown

@@ -73,21 +73,24 @@ All nested `events` blocks support the following common arguments:
     * `where` - (Optional) A filter that specifies all the NRDB events that are considered in this SLI (e.g, those that refer to a particular entity).
     * `select` - (Optional) The NRQL SELECT clause to aggregate events.
       * `attribute` - (Optional) The event attribute to use in the SELECT clause.
-      * `function` - (Required) The function to use in the SELECT clause. Valid values are `COUNT` and `SUM`.
+      * `function` - (Required) The function to use in the SELECT clause. Valid values are `COUNT`, `SUM`, `GET_FIELD`, and `GET_CDF_COUNT`.
+      * `threshold` - (Optional) Limit for values to be counter by `GET_CDF_COUNT` function.
   * `good_events` - (Optional) The definition of good responses. If you define an SLI from valid and good events, you must leave the bad events argument empty.
     * `from` - (Required) The event type where NRDB data will be fetched from.
     * `where` - (Optional) A filter that narrows down the NRDB events just to those that are considered good responses (e.g, those that refer to
     a particular entity and were successful).
     * `select` - (Optional) The NRQL SELECT clause to aggregate events.
         * `attribute` - (Optional) The event attribute to use in the SELECT clause.
-        * `function` - (Required) The function to use in the SELECT clause. Valid values are `COUNT` and `SUM`.
+        * `function` - (Required) The function to use in the SELECT clause. Valid values are `COUNT`, `SUM`, `GET_FIELD`, and `GET_CDF_COUNT`.
+        * `threshold` - (Optional) Limit for values to be counter by `GET_CDF_COUNT` function.
   * `bad_events` - (Optional) The definition of the bad responses. If you define an SLI from valid and bad events, you must leave the good events argument empty.
     * `from` - (Required) The event type where NRDB data will be fetched from.
     * `where` - (Optional) A filter that narrows down the NRDB events just to those that are considered bad responses (e.g, those that refer to
     a particular entity and returned an error).
     * `select` - (Optional) The NRQL SELECT clause to aggregate events.
         * `attribute` - (Optional) The event attribute to use in the SELECT clause.
-        * `function` - (Required) The function to use in the SELECT clause. Valid values are `COUNT` and `SUM`.
+        * `function` - (Required) The function to use in the SELECT clause. Valid values are `COUNT`, `SUM`, `GET_FIELD`, and `GET_CDF_COUNT`.
+        * `threshold` - (Optional) Limit for values to be counter by `GET_CDF_COUNT` function.
 
 ### Objective
 
@@ -151,6 +154,51 @@ resource "newrelic_entity_tags" "my_synthetic_monitor_service_level_tags" {
     }
 }
 ```
+
+
+Using `select` for events
+
+```hcl
+resource "newrelic_service_level" "my_synthetic_monitor_duration_service_level" {
+  guid        = "MXxBUE18QVBQTElDQVRJT058MQ"
+  name        = "Duration distribution is under 7"
+  description = "Monitor created to test concurrent request from terraform"
+
+  events {
+    account_id = 313870
+    valid_events {
+      from = "Metric"
+      select {
+        attribute = "`query.wallClockTime.negative.distribution`"
+        function = "GET_FIELD"
+      }
+      where = "metricName = 'query.wallClockTime.negative.distribution'"
+    }
+
+    good_events {
+      from = "Metric"
+      select {
+        attribute = "`query.wallClockTime.negative.distribution`"
+        function =  "GET_CDF_COUNT"
+        threshold = 7
+      }
+      where = "metricName = 'query.wallClockTime.negative.distribution'"
+    }
+  }
+
+  objective {
+    target = 49
+    time_window {
+      rolling {
+        count = 7
+        unit  = "DAY"
+      }
+    }
+  }
+}
+```
+
+
 For up-to-date documentation about the tagging resource, please check [newrelic_entity_tags](entity_tags.html#example-usage)
 
 ## Import