我正在使用数据库,我需要验证“付款”模式下的某些列。
就像不使用信用卡付款一样,应将CreditCardNumber,CardHoldersName和CreditCardExpDate设置为NULL。如果使用信用卡,则CreditCardExpDate值应大于PaymentDate PaymentDue可以为NULL,但不得大于PaymentAmount
我已经在网上搜索过,但是得到的是复杂的触发器和过程,它们并没有真正的帮助。
create table Payment.Payments(
Payment_ID int identity (200, 21),
Payment_Amount money constraint chk_Payment_Amount check (Payment_Amount >
'0'),
Payment_Date date, -- is to be greater than the end date which is on another table
Credit_Card_Number int,
Card_Holders_Name char (50),
Credit_Card_Expiry_Date date,
Project_ID int Foreign Key references ProjectDetails.Projects(Project_ID),
Payment_Due money -- should not be greater than Payment Amount but
can still accept null*
);
注释显示了我当前遇到的验证问题。
我为payment_date创建了一个触发器,但是我只能在插入的日期大于当前日期时触发它,如果它小于结束日期(结束日期在另一个表上),我就需要它触发
创建触发器付款日期 关于付款 插入 如 DECLARE @ModifiedDate日期 SELECT @ModifiedDate = Payment_Date从插入 IF(@ModifiedDate> getdate()) 开始 PRINT'修改日期应为当前日期。因此,无法插入。” 回滚交易 结束
答案 0 :(得分:0)
我在这里在两行之间读了很多书,但我认为这是您要追求的(注意,尽管我使用了CornerRadius
模式):
dbo
对卡号数据类型的注释:
信用卡号的数据类型USE Sandbox;
GO
CREATE TABLE dbo.Payments (
Payment_ID int identity(200, 21),
Payment_Amount money CONSTRAINT chk_Payment_Amount CHECK (Payment_Amount > '0'),
Payment_Date date,
Credit_Card_Number char(19), --note datatype change from int to char. See my comment below (copied from my comment)
Card_Holders_Name varchar (50), --note I've used varchar instead. Names aren't all 50 characters long
Credit_Card_Expiry_Date date,
--Project_ID int FOREIGN KEY REFERENCES ProjectDetails.Projects(Project_ID) --Commented out as I don't have this table
Payment_Due money CONSTRAINT chk_Payment_Due CHECK (Payment_Due > '0' OR Payment_Due IS NULL)
);
GO
--Credit Card format validation
ALTER TABLE dbo.Payments ADD CONSTRAINT ck_Credit_Card CHECK (Credit_Card_Number LIKE '[0-9][0-9][0-9][0-9] [0-9][0-9][0-9][0-9] [0-9][0-9][0-9][0-9] [0-9][0-9][0-9][0-9]' OR Credit_Card_Number IS NULL);
--Add card details must be there, or none.
ALTER TABLE dbo.Payments ADD CONSTRAINT ck_Card_Details CHECK ((Credit_Card_Number IS NULL AND Card_Holders_Name IS NULL AND Credit_Card_Expiry_Date IS NULL)
OR (Credit_Card_Number IS NOT NULL AND Card_Holders_Name IS NOT NULL AND Credit_Card_Expiry_Date IS NOT NULL))
GO
DROP TABLE dbo.Payments;
有点矛盾。 int
的最大值为2,147,483,647,并且卡号由4组4位数字的号码(即int
)组成。即使是数字,也远远高于9999 9999 9999 9999
的最大值。我建议使用int
并对格式进行限制。