I am currently doing this:
SELECT SS.service_name , SS.id, SH.shortcode FROM smsc_app_db.service SS
INNER JOIN shortcode SH ON SS.confirmation_shortcode = SH.id;
SELECT count(service_id) FROM smsc_app_db.service_status
where smsc_app_db.service_status.service_id = ?;
After running the first select, I get the result in java, then for each row of the ResultSet, I use the SS.ID value to count the number of subscribers to that service on the service_status table (using the second statement)
But I would like to combine the 2 statements into one.
Is it possible to make the select count(service_id)
a column in the first select statement?
eg if the result of
select count(service_id)....
is stored in subscriber_base
SELECT SS.service_name , SS.id, SH.shortcode, subscriber_base FROM
smsc_app_db.service SS INNER JOIN shortcode SH ON SS.confirmation_shortcode = SH.id;
join
the service_status table to the existing query and aggregate to get the counts.
SELECT SS.service_name, SS.id, SH.shortcode, count(*) subscriber_base
FROM smsc_app_db.service SS
INNER JOIN shortcode SH ON SS.confirmation_shortcode = SH.id
INNER JOIN smsc_app_db.service_status sstat ON sstat.service_id = SS.id
GROUP BY SS.service_name, SS.id, SH.shortcode
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.