相关疑难解决方法(0)

我在 SQL Server 2012 中遵循了我的实际查询的简化版本。从 Containers 表中选择数据时，它在搜索谓词中有一个标量运算符。

这个搜索谓词中标量运算符的目的是什么？

CREATE TABLE #EligibleOrders (OrderID INT PRIMARY KEY,
                             StatusCD CHAR(3),
                              CreatedOnDate DATETIME
                              )
--insert logic into #EligibleOrders

--Final Query
SELECT T2.OrderID ,olic.LineItemID,
        SUM(c.quantity) AS ShippedQty,
        COUNT(DISTINCT c.ContainerID) AS ShippedCases
FROM #EligibleOrders T2
INNER JOIN dbo.OrderLineItemContainers (NOLOCK) AS olic 
    ON  olic.OrderID = T2.OrderID
INNER JOIN dbo.Containers (NOLOCK) AS c
    ON olic.Containerid = c.Containerid
GROUP BY T2.OrderID ,olic.LineitemID 
OPTION (MAXDOP 1)

执行计划

寻求谓词