下面的查询需要20秒来执行,我需要尽可能多地优化它。请帮助我。需要20 - 30秒才能运行的SQL查询优化
SELECT Distinct
qh.QuoteHeaderId, [dbo].[mpx2_Get_PhoneGrade](qh.QuoteHeaderId)
FROM
t_QuoteHeader QH
INNER JOIN
t_HandsetQuote h ON Qh.QuoteHeaderId = h.QuoteHeaderId
INNER JOIN
t_phoneAudit P ON ISNULL(h.InspectionPhoneAuditId, h.QuotePhoneAuditId) = p.PhoneAuditId
INNER JOIN
mpx2_vw_customers C ON qh.CustomerId = C.CustomerId
INNER JOIN
@ContactChannels CC ON C.ContactChannelId = CC.ContactChannelId
LEFT OUTER JOIN
t_HandsetQuoteAdditionalInfo_TRNX hqa ON hqa.hqid = h.HandsetQuoteId
WHERE
((@VirtualStatusId = 0 OR @VirtualStatusId = -2 OR
C.ContactChannelId NOT IN (1, 2, 13, 80)))
AND ((@VirtualStatusId = -2) OR
('Q'+ CAST(Qh.QuoteStatusId AS VARCHAR(3)) + 'S' + CAST(h.StockStatusId AS VARCHAR(3)) IN
(SELECT 'Q'+ CAST(QuoteStatusId AS VARCHAR(3)) + 'S' + CAST(StockStatusId AS VARCHAR(3)) FROM t_VirtualStatusMap WHERE (@VirtualStatusId IS NULL OR @VirtualStatusId IN (0,-1) OR VirtualStatusId = @VirtualStatusId))
)
)
AND ((qh.IsCancelled = 0 and @onlyOpenOrders = 1) OR @onlyOpenOrders = 0)
AND ((h.IsCancelled = 0 and @onlyOpenOrders = 1) OR @onlyOpenOrders = 0)
AND (qh.ConfirmedDate <= @CutOff)
请帮我优化它。此查询用于存储过程。
如何在不知道数据库结构或者查看查询计划的情况下提供帮助? – DavidG
对不起,但我必须上传执行计划 – HarshSharma
只需[编辑]问题。 – DavidG