试图加快SQLITE UNION QUERY

I have the below SQLITE code

我有以下SQLITE代码

SELECT x.t,
CASE WHEN S.Status='A' AND M.Nomorebets=0 THEN S.PriceText ELSE '-' END AS Show_Price
FROM sb_Market M
LEFT OUTER JOIN
(select 2010 t union
select 2020 t union
select 2030 t union
select 2040 t union
select 2050 t union
select 2060 t union
select 2070 t
) as x
LEFT OUTER JOIN sb_Selection S ON
S.MeetingId=M.MeetingId AND
S.EventId=M.EventId AND
S.MarketId=M.MarketId AND
x.t=S.team
WHERE M.meetingid=8051 AND M.eventid=3 AND M.Name='Correct Score'
S