我试图创建一个简单的选择语句,似乎无法做到正确。我有三张桌子。这是架构。
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这是我的初始查询,用于计算未结订单和已发货订单,并按销售代表ID过滤列表。这很有效,并且给了我这个结果。
CREATE TABLE IF NOT EXISTS `SalesRepDealer` (
`Id` int(11) NOT NULL AUTO_INCREMENT,
`DealerId` varchar(20) NOT NULL,
`DealerName` varchar(50) NOT NULL,
`SalesRepId` varchar(30) NOT NULL,
`SalesRepName` varchar(30) NOT NULL,
PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=629 ;
CREATE TABLE IF NOT EXISTS `PriorYearBoatOrders` (
`Id` int(11) NOT NULL AUTO_INCREMENT,
`DealerId` varchar(20) NOT NULL,
`PriorYearSalesTotal` int(11) NOT NULL,
PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2234 ;
CREATE TABLE IF NOT EXISTS `BoatOrdersCurrentYear` (
`Id` int(11) NOT NULL AUTO_INCREMENT,
`DealerId` varchar(40) COLLATE utf8_bin NOT NULL,
`DealerName` varchar(50) COLLATE utf8_bin NOT NULL,
`OrderNum` varchar(10) COLLATE utf8_bin NOT NULL,
`BoatDescription` varchar(50) COLLATE utf8_bin NOT NULL,
`SerialNum` varchar(50) COLLATE utf8_bin NOT NULL,
`CompleteDate` varchar(15) COLLATE utf8_bin DEFAULT NULL,
`ShipDate` varchar(15) COLLATE utf8_bin DEFAULT NULL,
`ShipBy` varchar(15) COLLATE utf8_bin DEFAULT NULL,
`Invoice` varchar(15) COLLATE utf8_bin DEFAULT NULL,
`DocUnitPrice` int(11) DEFAULT NULL,
`Customer` varchar(50) COLLATE utf8_bin DEFAULT NULL,
`Po` varchar(30) COLLATE utf8_bin NOT NULL,
PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=8192 ;
现在我只想添加上一年的总数。我尝试了连接和其他选择的组合,但计数搞砸了,开始变得不稳定。我只需要从上面的查询中获取Dealer Id并将其匹配到PriorYearBoatOrders并返回PriorYearSalesTotal。但这是我一直在尝试的查询和结果。
SELECT DealerId, DealerName, sum(case when ShipDate = '' then 1 else 0 end) AS NumOpenOrders, sum(case when ShipDate != '' then 1 else 0 end) AS NumShipped FROM BoatOrdersCurrentYear WHERE DealerId IN (SELECT DealerID FROM SalesRepDealer WHERE SalesRepId = 'bba') Group By DealerName
DealerId DealerName NumOpenOrders NumShipped
BACA082017 Antler's Resort & Marina 0 5
CDGWAZ001 Got Water Marine 7 31
CDORHI014 HILLYERS SANTIAM MOTOR SPORTS 10 9
CDCAJM317 JOHNSON MARINE SUPPLIES INC 4 5
CDCABA0117 KDME, INC 4 0
CDIAMM015 Mark's Marine, Inc. 0 16
CDCANE001 Newport Pontoons, Inc. 0 1
CDIDPR043 Prestige Water Sports 15 4
我不确定发生了什么,以及为什么总数太远了。但我对查询的写作非常陌生。感谢任何帮助,对于格式不良的架构和查询感到抱歉。
答案 0 :(得分:0)
对于每个经销商,您将加入今年的数据与去年的每个经销商数据 - 给您一个交叉加入;你需要在DealerId上添加一个连接条件匹配。
但您还需要从DealeId列表开始,否则即使是DealerId上的条件,您也会交叉加入订单。
SELECT
d.DealerId,
cy.DealerName,
sum(case when cy.ShipDate = '' then 1 else 0 end) AS NumOpenOrders,
sum(case when cy.ShipDate != '' then 1 else 0 end) AS NumShipped,
py.PriorYearSalesTotal
FROM (SELECT distinct DealerId FROM SalesRepDealer WHERE SalesRepId = 'bba') d
JOIN BoatOrdersCurrentYear cy on cy.DealerId = d.DealerId
LEFT JOIN PriorYearBoatOrder py on py.DealerId = d.DealerId
group by 1,2
请注意使用: