QUESTION POSED ON: 10 January 2006
I would like to execute this query faster. Can you please help me? The
query works but it can get slow with different values.
select distinct (tb1.SupporterID), tb1.lotteryNumber, tb1.DrawNumber,
tb1.PrizeDrawID, tb1.prizeValue,
tb1.winningTicket, tb1.title, tb1.initials, tb1.surname,
tb1.address1,tb1.address2,tb1.address3,tb1.address4,
tb1.supporterNumber, tb1.prizeName from ( select
distinct pw1.SupporterID, pw1.PrizeWinID, Lpt.lotteryNumber,
pw1.DrawNumber, pw1.PrizeDrawID,
pd.prizeValue, pw1.winningTicket, pw1.title, pw1.initials, pw1.surname,
pw1.address1,pw1.address2,pw1.address3,pw1.address4, s.supporterNumber,
p.prizeName from prize_win pw1
inner join ( select pt.purchasedTicketID,L.lotteryNumber from
purchased_Ticket pt inner join lottery L
on pt.lotteryID = L.lotteryID where L.lotteryNumber between 215 and
230) Lpt on pw1.PurchasedTicketID =
Lpt.purchasedTicketID inner join prize_draw pd on pw1.PrizeDrawID =
pd.PrizeDrawID inner join supporter
s on pw1.SupporterID = s.SupporterID inner join prize p on
pw1.PrizeDrawID = p.PrizeDrawID) tb1 inner
join (select pw1.SupporterID, pw1.PrizeWinID from prize_win pw1 inner
join ( select
pt.purchasedTicketID from purchased_Ticket pt inner join lottery L on
pt.lotteryID = L.lotteryID where
L.lotteryNumber between 215 and 230) Lpt on pw1.PurchasedTicketID =
Lpt.purchasedTicketID ) tb2 on
tb1.SupporterID = tb2.SupporterID where tb1.PrizeWinID <> tb2.PrizeWinID
order by tb1.SupporterID asc;
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