SQL Help - **Newbie**

[davebit]

Hi ya'll - realizing this isn't an Excel question but hoping someone could help me interpret the output of the following SQL query and how it is structured.

Here is some information about the database:
- conversations_conversation records represent a single conversation between two people (owner and provider) on the platform.
- services_service records represent the descriptive values of services offered through the Rover platform. Providers can have multiple records if they offer more than one service. It has a one-to-many relationship with conversations_conversation

with


raw as(
select
service_type,
cc.start_date as convo_start,
cc.end_date as convo_end,
cc.booked_at as booked_date,
cc.cancelled_at as cancelled_date

from conversations_conversation cc
join services_service ss on cc.service_id = ss.id
),

agg as (
select
service_type,
min(julianday(convo_end) - julianday(convo_start)) as min_ttb,
round(avg(julianday(convo_end) - julianday(convo_start)), 1) as avg_ttb,
max(julianday(convo_end)-julianday(convo_start) as max_ttb

from raw

where
booked_date is not null
and cancelled_date is null

group by 1

having (julianday(convo_end) - julianday(convo_start))>= 1.0
)

select * from agg

union select '*min_vals*', min(min_ttb), min(avg_ttb), min(max_ttb) from agg

order by 3 desc, 1 desc

Thanks in advance for the help!