Question

我是sql server的新人，写下这个问题：

SELECT top 20 y.Telno,
        t.Cycle+'-'+y.Cycle Cycle,
        ((y.CurBill - t.CurBill)/y.CurBill) Price
FROM [ClubEatc].[dbo].[GetOnlineBills] y
INNER JOIN [ClubEatc].[dbo].[GetOnlineBills] t
    ON y.Telno = t.TelNo AND CAST(y.Cycle as int)-1 = CAST(t.Cycle as int)

在实际数据中GetOnlineBills Cycle=952中有TelNo CurBill TotalBill ExecuteDate Cycle 4133223011 43 1209337 1395/4/21 952的记录：

Cycle=951

并在TelNo CurBill TotalBill ExecuteDate Cycle 4133223011 349 1209295 1395/4/21 951：

calc

在计算(Curbill.Cycle[952]-Curbill.Cycle[951])/Curbill.Cycle[952]=((349-43))/349=0.87这个公式：

-7.11627906976744

但是查询显示给我：

#if __IPHONE_OS_VERSION_MAX_ALLOWED <= __IPHONE_9_3  
#define CBManagerState CBCentralManagerState  
#define CBManagerStateUnknown CBCentralManagerStateUnknown  
#define CBManagerStateResetting CBCentralManagerStateResetting  
#define CBManagerStateUnsupported CBCentralManagerStateUnsupported  
#define CBManagerStateUnauthorized CBCentralManagerStateUnauthorized  
#define CBManagerStatePoweredOff CBCentralManagerStatePoweredOff  
#define CBManagerStatePoweredOn CBCentralManagerStatePoweredOn  
#endif

发生了什么？我错了？感谢所有人。

Answer 1

你的代码正在做（（43-349））/ 43并给出结果 -

使用以下代码...

 SELECT top 20 y.Telno,
         t.Cycle+'-'+y.Cycle Cycle,
        ((t.CurBill - y.CurBill)/t.CurBill) Price FROM [ClubEatc].[dbo].[GetOnlineBills] y INNER JOIN
 [ClubEatc].[dbo].[GetOnlineBills] t
     ON y.Telno = t.TelNo AND CAST(y.Cycle as int)-1 = CAST(t.Cycle as int)

为什么我的查询不正确？

1 个答案: