如何从唯一 id 基础 varchar 数据类型中获取值

Posted 2023-05-08

【中文标题】如何从唯一 id 基础 varchar 数据类型中获取值

【英文标题】：How to get value from unique id basis varchar datatype

【发布时间】：2018-05-19 10:15:23

【问题描述】：

我有以下疑问；你能帮我吗？我有 comboAmount 和 TotalPrice，我想将 TotalPrice + Combo Amount 添加到 newComboAmount 中，但由于我的 ComboUniqueId 与其他不同，因此显示错误结果，请查看下图并查询

SELECT
    CAST(CASE 
            WHEN a.TotalPrice != 0 
               THEN 1  
               ELSE 0  
         END AS bit) AS CheckOtherPrice, 
    a.OrderDetailId, a.ItemId,
    b.ItemCode, b.ItemName,
    e.GroupName,
    a.Quantity, a.Price, a.TotalPrice,
    a.OrderId, ISNULL(a.ComboId, 0) ComboId, 
    (a.ComboAmount + SUM(a.TotalPrice) OVER (ORDER BY a.OrderDetailId)) AS new_comboamount,  
    a.ComboGroupId, a.ComboAmount, a.ComboUniqueId,
    c.ComboName, d.GroupName ComboGroupName,
    a.OfferMasterId 
FROM
    OrderDetail a
INNER JOIN
    ItemMaster b ON a.ItemId = b.ItemId AND a.OrderId IN (985)
INNER JOIN
    ItemGroup e ON b.ItemGroupId = e.ItemGroupId
LEFT JOIN
    ComboMaster c ON a.ComboId = c.ComboId
LEFT JOIN 
    ComboGroup d ON a.ComboGroupId = d.GroupId

【参考方案1】：

我想你只需要一个partition by:

( a.ComboAmount + sum(a.TotalPrice) over (partition by combouniqueid order by a.OrderDetailId) ) as new_comboamount