Question

我想缩短执行时间

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Answer 1

这里是一个简单得多的版本。将来，即使您无法获得执行计划，也无法发布表定义（包括索引），这是一个巨大的帮助。

注意where子句。它使用日期而不是函数来使其可保存。

SELECT sum(case when year(header.[Posting Date]) = 2019 then line.Amount end) AS SaleIn2019
    , sum(case when year(header.[Posting Date]) = 2018 then line.Amount end) AS SaleIn2018
    , sum(case when year(header.[Posting Date]) = 2017 then line.Amount end) AS SaleIn2017
    , sum(case when year(header.[Posting Date]) = 2016 then line.Amount end) AS SaleIn2016
    , sum(case when year(header.[Posting Date]) = 2015 then line.Amount end) AS SaleIn2015
FROM [Uneek Clothing Company Ltd$Sales Invoice Header] header
INNER JOIN [Uneek Clothing Company Ltd$Sales Invoice Line] line ON header.No_ = line.[Document No_]
WHERE header.[Sell-to Customer No_] = 'WOR07'
    AND line.Type = 2
    and header.[Posting Date] >= '20150101'
    and header.[Posting Date] < '20200101'

我的查询有2秒的执行时间，但我希望它有0秒的执行时间

1 个答案: