Question

我编写了代码来创建表并将Products表中的信息插入到ProductsAudit表中。我的问题是，当我将数据插入Products表时，我收到一个错误，告诉我DateUpdated列不允许NULL值。我试图插入GETDATE（）并且无法找出造成问题的原因。

USE MyGuitarshop

GO

CREATE TABLE ProductsAudit(
    AuditID         int         PRIMARY KEY IDENTITY,
    ProductID       int         NOT NULL,
    CategoryID      int         NOT NULL,
    ProductCode     varchar(10) NOT NULL,
    ProductName     varchar(255)NOT NULL,
    ListPrice       money       NOT NULL,
    DiscountPercent money       NOT NULL,
    DateUpdated     datetime2   NOT NULL);

GO

CREATE TRIGGER ProductsAudit_UPDATE
    ON Products
    AFTER INSERT, UPDATE

AS

   INSERT INTO 
        ProductsAudit (ProductID, CategoryID, ProductCode, ProductName, ListPrice, DiscountPercent, DateUpdated)
           SELECT 
              Products.ProductID, 
              Products.CategoryID, 
              Products.ProductCode, 
              Products.ProductName, 
              Products.ListPrice, 
              Products.DiscountPercent, 
              DateAdded AS DateUpdated
          FROM Products


GO

INSERT INTO
    Products (CategoryID, ProductCode, ProductName, Description, ListPrice,DiscountPercent, DateAdded)
        Values
            (1, '229715', 'Sushi', 'Great food for hungry students', 9.99, 12, GETDATE());

GO

USE MyGuitarShop

SELECT * FROM ProductsAudit

Answer 1

我认为您可能希望AuditID成为identity列：

CREATE TABLE ProductsAudit(
    AuditID         int         IDENTITY PRIMARY KEY,

完成后，您无需在插入中指定该列。您也可能打算将getdate()用于DateUpdated，尤其是因为您在DateAdded的{{1}}列中插入了null。

Product

调试插入触发器

1 个答案: