is it possible to use output of inner query to input of outer query where caluse?

Question

like

select ho from (select sourceaddress,count(sourceaddress) as 
src,hour(eventtime) as ho 
from default.fullandfinal 
where sourceaddress='0.0.0.0' and  eventtime between '2019-05-11 00:00:00' and 
'2019-05-11 19:59:59'  
group by sourceaddress,hour(eventtime) order by sourceaddress,ho) t where 
src=28350;

the output of this query is 11 and i want to use this output in my nxt query which is

select sourceaddress,destinationaddress,destinationport,name,count(*) as count  
from fullandfinal 
where eventtime like "11%" and sourceaddress='0.0.0.0'  
group by sourceaddress,destinationaddress,destinationport,name 
order by count desc limit 5; 

i want to write single query for this is it possible ?

Answer 1

Considering MySQL - Yes possible. You have to use the first query as Sub Query in the second Query. The query structure will be something like this-

SELECT *,
(SELECT ID FROM TABLE_1 WHERE ....) AS [From Other Query] -- In the selection part 
FROM TABLE_2
WHERE TABLE_2.ID = (SELECT ID FROM TABLE_1 WHERE ....) -- In Where condition

For both above case, you have to make sure your sub query returns one single value that is like 11 you mentioned.

Try This-

SELECT sourceaddress,
destinationaddress,
destinationport,
[name],
COUNT(*) as [count]  
FROM fullandfinal 
WHERE 
eventtime LIKE
(
    SELECT ho FROM 
    (
        SELECT sourceaddress,
        COUNT(sourceaddress) AS src,
        HOUR(eventtime) AS ho 
        FROM DEFAULT.fullandfinal 
        WHERE sourceaddress='0.0.0.0' 
        AND  eventtime BETWEEN '2019-05-11 00:00:00' AND '2019-05-11 19:59:59'  
        GROUP BY sourceaddress,
        HOUR(eventtime) 
        ORDER BY sourceaddress,ho
    ) t
    WHERE src=28350
) + '%' 
AND sourceaddress='0.0.0.0'  
GROUP BY sourceaddress,destinationaddress,destinationport,name 
ORDER BY COUNT(*) DESC 
limit 5;