Question

这是我的表数据： -

Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (1,'Cinthol','cosmetic soap','soap');
Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (1,'Cinthol','cosmetic soap','soap');
Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (1,'Cinthol','cosmetic soap','soap');
Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (1,'Lux','cosmetic soap','soap');
Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (1,'Crowning Glory','cosmetic soap','soap');
Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (2,'Cinthol','nice soap','soap');
Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (3,'Lux','nice soap','soap');
Insert Into tblProduct (ProductId,ProductName,Description,Category) Values (3,'Lux','nice soap','soap');

当我发出此查询时： -

Select  ProductId, 
        ProductName, 
        Description,
        Category, 
        RANK() Over ( partition by ProductId Order By ProductId) As Rank
From tblProduct;

我所能看到的每一行都有1st等级。所有其他其他职级在哪里？由于我没有使用2，因此productid 6的行应该具有等级DENSE_RANK()。为什么查询不起作用？

Answer 1

您正在按ProductId进行分区 - 这意味着每个“分区”将从1开始变换。尝试删除PARTITION BY ProductId。

为什么Rank（）不能正常工作？

1 个答案: