我有三张桌子:
LandingDetails,包含LandingId,ProductId和UnitPrice
字段具有LandingId和LandingDate字段的LandingHeaders
包含ProductId和CostPrice字段的产品
我希望根据落在两个日期之间的登陆日期中的登陆日期,从产品的成本价格中更新LandingDetails UnitPrice。
在第一次尝试时,我提出了以下内容,这可能与目标的概念一致,但显然错过了表连接。
cat /data/market_voices_spam_classifier/v5/logs/server.log | sh mapper.sh | python2.7 reducer.py | pee 'tee spammers-`date -d "-1 days" +%Y-%m-%d`' "EMAIL=noreply mutt -s 'Test Mail' mail_id@gmail.com"
第二版如下,但我怀疑连接不正确。
CREATE PROCEDURE dbo.UpdateAndPriceLandings
@StartDate DATE,
@EndDate DATE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
UPDATE LandingDetails
SET UnitPrice = (SELECT p.CostPrice FROM Products p WHERE p.ProductId = LandingDetails.ProductId AND
dbo.LandingHeaders.LandingId = LandingId AND dbo.LandingHeaders.LandingDate1 BETWEEN @StartDate AND @EndDate)
GO
任何人都可以指出我怀疑的是我的愚蠢的语法错误吗?
答案 0 :(得分:4)
您在第二个SP中的查询应如下所示:
UPDATE
dbo.LandingDetails
SET
UnitPrice=p.CostPrice
FROM
dbo.LandingDetails ld
INNER JOIN dbo.LandingHeaders lh ON
lh.LandingId=ld.LandingId
INNER JOIN dbo.Products P ON
P.ProductId=ld.ProductId
WHERE
lh.LandingDate BETWEEN @StartDate AND @EndDate