Final answer:
The change_request_metric database view likely joins metric_definition, change_request, and metric_instance tables. These tables define metrics, log change requests, and record metric instances, respectively. Other tables like task_sla and change_task might be involved depending on SLAs and task-level metrics.
Step-by-step explanation:
The change_request_metric database view commonly joins several related tables to consolidate data relevant to change requests and their associated metrics. Generally speaking, in a typical IT service management (ITSM) database schema, such as the one used by ServiceNow, you would expect the change_request_metric view to join tables that are directly related to the measurement and evaluation of change requests.
While the exact tables can vary based on the specific implementation and customizations, the tables that are most likely included in such a join, considering standard ITSM practices, are:
- metric_definition: This table usually contains the definitions for the metrics being collected, such as what each metric measures and how it is calculated.
- change_request: This is the central table where individual change requests are logged and managed.
- metric_instance: This table typically holds the individual instances of metrics that have been recorded, often linked to the specific change request they pertain to.
The tables task_sla and change_task could potentially be joined if the metrics being evaluated are influenced by the service level agreements (SLAs) associated with each task, or if the metrics are collected at the task level within a change request.