Grouping Totals by non standard quarters in MySQL -


i have simple table includes seller, buyer, transaction date, , total.

i want sum transactions each seller quarters on given year. quarters begin on june 1 , end on may 31.

i know how sum seller given date range, can't figure out how multiple quarters.

i like

seller q1total q2total q3total q4total

seems should simple i'm struggling figure out.

you can conditional aggregation:

select seller,        sum(case when transactiondate between '20150601' , '20150831' amount else 0 end) q1amount,        sum(case when transactiondate between '20150901' , '20151231' amount else 0 end) q2amount,        sum(case when transactiondate between '20160101' , '20160229' amount else 0 end) q3amount,        sum(case when transactiondate between '20160301' , '20160531' amount else 0 end) q4amount tablename group seller

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