Question

为什么我的CTE不能从我最后的选择中获取？我具体问我如何列出我的CTE，我遗漏了一些简单的事情，例如我如何分离最后两个

    with ParentsIdsWhoHaveInventoryWithManifests_CTE(brokerIds)
    as (...)
        ...)
        select someField from ParentsIdsWhoHaveInventoryWithManifests_CTE

    ;with SpecificBrokersTicketIds_CTE(ticketIds)
    as (...)
        select someFieldfrom ParentsIdsWhoHaveInventoryWithManifests_CTE

    ;with ProductionIdsWhichHaveManifests_CTE(productionIds)
    as (...)
        select productionIds from ProductionIdsWhichHaveManifests_CTE

    ;with InventoryRow_CTE(row)
    as (select row from Inventory where TicketId = @TicketId)

    ;with InvenotrySection_CTE(section)
    as (select section from Inventory where TicketId = @TicketId)


    select @ManifestId = ManifestId from Productions p where p.ProductionId = @ProductionId
    select @ProductionId as ProductionId_Used
    select @ManifestId as ManifestId_Used
    select @TicketId = TicketId from inventory where ProductionId = @ProductionId

...

update Venue_ManifestDetails
        set Row = row from InventoryRow_CTE,
        Section = section from InvenotrySection_CTE
        where TicketId = @TicketId

问题是我的更新声明中无法识别InventoryRow_CTE或InvenotrySection_CTE CTE。

Answer 1

您只能在一个后续语句中使用CTE。您不能在2个或更多语句中使用它。

MSDN以这种方式解释：

公用表表达式（CTE）可以被认为是在单个 SELECT，INSERT，UPDATE，DELETE或CREATE VIEW语句的执行范围内定义的临时结果集。 / p>

如果要存储CTE的结果，请使用临时表或视图，并将CTE中的所有记录放入其中..

Answer 2

CTE只是语法
如果你需要重复使用它重复它我知道这看起来很奇怪但是就是这样它只是语法 - 复制粘贴

您可以使用#temp或表变量

CTE未被认可

2 个答案: