Hello,
I have following SELECT statement in my program (Delphi+sqlite3):
_________________________________________________________________________________________
select
id,power,
(select sum
((strftime("%s",table2.endtime)-strftime("%s",table2.begintime))*table2.power)
from table2 where table1.id=table1_id),
(
select min(point) from points where points.table1_id=table1.id and
point >=
(select sum
((strftime("%s",table2.endtime)-strftime("%s",table2.begintime))*table2.power)
from table2 where table1.id=table2.table1_id)
),
(
(
select min(point) from points where points.table1_id=table1.id
and point >=
(select sum
((strftime("%s",table2.endtime)-strftime("%s",table2.begintime))*table2.power)
from table2 where table1.id=table2.table1_id )
)
-
(select sum
((strftime("%s",table2.endtime)-strftime("%s",table2.begintime))*table2.power)
from table2 where table1.id=table1_id)
) / power
from table1
where standing=1
group by table1.id
order by table1.id
________________________________________________________________________________________
This statement contains text that is repeated 4 times:
(select sum
((strftime("%s",table2.endtime)-strftime("%s",table2.begintime))*table2.power)
from table2 where table1.id=table2.table1_id)
How to reduce this statement and avoid double calculations?
Thanks,
Michael.
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