sql - SUM MySQL rows of one column and have it group by another -

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hey guys i'm trying create query sums 1 column , groups result another.

let me show mean showing tables!

this tickets table

enter image description here

expect result

enter image description here

as can see groups column app , issue , sums time per issue.

currently have this

 select app,issue,sum(time)  tickets  group issues  order name asc;

however it's not outputting expected result. appreciated.

you need group app in addition issues

select app,issue,sum(time) tickets group app,issue order name asc;

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