Question

我正在尝试将产品批量映射到catergoryID表。每个产品都有一个SKU代码，然后映射到CategoryID表。该脚本执行正常，但当我看到产品没有映射。知道我哪里错了吗？是因为prodcutID已经存在了吗？

create table tmp_products (ProductID int, SKU nvarchar(100) collate SQL_Latin1_General_CP1_CI_AS, CategoryID int)

insert into tmp_products (SKU, CategoryID) values ('CLFLNW1',1252)
insert into tmp_products (SKU, CategoryID) values ('CLFROCR013',1252)
insert into tmp_products (SKU, CategoryID) values ('GBLGOKOM',1252)
insert into tmp_products (SKU, CategoryID) values ('HS008714',1252)
insert into tmp_products (SKU, CategoryID) values ('HS014928',1252)
insert into tmp_products (SKU, CategoryID) values ('HS400085',1252)
insert into tmp_products (SKU, CategoryID) values ('HS400093',1252)
insert into tmp_products (SKU, CategoryID) values ('HS400101',1252)
insert into tmp_products (SKU, CategoryID) values ('HS400135',1252)


update tmp_products
set ProductID = p.ProductID
from product p
join tmp_products t on t.SKU = p.SKU

insert into ProductCategory (ProductID, CategoryID, DisplayOrder)
select ProductID, CategoryID, 1
from tmp_products
where ProductID not in
(select pc.ProductID
from ProductCategory pc
join tmp_products tp on tp.ProductID = pc.ProductID)
and ProductID is not null

drop table tmp_products

Answer 1

您的INSERT无法添加其他类别;一旦产品在表ProductCategory中有一个类别，就不会再添加。

您可以在子查询中添加WHERE条件：

WHERE pc.CategoryID = tmp_products.CategoryID

完整的INSERT语句现在变为：

INSERT INTO ProductCategory (ProductID, CategoryID, DisplayOrder)
SELECT ProductID, CategoryID, 1
FROM tmp_products
WHERE ProductID NOT IN (
    SELECT pc.ProductID
    FROM ProductCategory pc
    JOIN tmp_products tp ON tp.ProductID = pc.ProductID
    WHERE pc.CategoryID = tmp_products.CategoryID
)
AND ProductID IS NOT NULL

SQL脚本正在执行但结果未显示

1 个答案: