sql - Build Best index for this Query -


i have query. query takes time return results. made possible combination of where, funcs(), index. index in table, or similar tables 10 times in space data. if data 1gb, indexex 10gb.

i believe proper index, return result instantly. when same field repeats itself, money7, means same field in search more times.

looking & suggestions.

select top 100      tinyint3, money1, money2, money3, money4,     count(date1),      (sum(money7) - (sum(smallint1) * moneyconstval)) / count(date1),     sum(smallint1), (sum(money7) - (sum(smallint1) * moneyconstval)) / sum(smallint1),     sum(money7) - (sum(smallint1) * moneyconstval)  colresultname     ssum1 with(nolock)      day <= '2008-10-31' , profitprotect <= 100 group      tinyint3, money1, money2, money3, money4 order      colresultname desc, money1, money2 desc, money3 desc, money4

for case try index:

create nonclustered index ix_ssum1_search  on ssum1  (day,profitprotect)

usually indexes created columns included in where


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