How to Retrieve Host and Template Names from Multiple Zabbix Tables Using a Single ID Column?

Query Multiple Tables from a Single ID Column

In a recent query, a user sought to display which hosts utilized specific templates from the Zabbix table. However, both hosts and templates were listed in the same table, creating a challenge in distinguishing them.

To address this issue, the user referenced a second table, hosts_templates, which provided the correlation between hosts and templates. The hosts_templates table, containing columns for host_template ID, host ID, and template ID, offered the data required for connecting the hosts and template names.

Solution

To achieve the desired output, a query with double joins is necessary:

SELECT h1.name as host_name, h2.name AS template_name
FROM hosts_template AS t
JOIN hosts AS h1 ON t.hostid = h1.hostid
JOIN hosts AS h2 ON t.hosttemplateid = h2.hostid

In this query:

• The hosts_template table is aliased as t for clarity.
• h1 represents the hosts table, and h2 represents the templates table.
• The SELECT clause retrieves the host name from the first join (h1.name) and the template name from the second join (h2.name).
• The double join allows for the connection between the host ID and template ID in the hosts_template table with the corresponding host and template names in the hosts table.

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