Question

我在SQL中有一个表，其中包含一个名为CCARD-000093 CCARD-000094 CCARD-000095 CCARD-000096 CCARD-000097 CCARD-000098 CCARD-000099 CCARD-000100 CCARD-000101

的列

数据，例如

SELECT 'CCARD-' + 
(SELECT CAST(MAX(CAST(SUBSTRING(ccc.CreditCardCode,7, 6) as INT)) AS 
NVARCHAR(MAX)) FROM CustomerCreditCard ccc)

将数据插入此表时，如何获取序列中的下一个值？

这是我到目前为止所拥有的

CCARD-101

这会给CCARD-000101

如何让它返回defaultConfig { applicationId "com.example.myname.myprj" minSdkVersion 15 targetSdkVersion 23 versionCode 1 versionName "1.0" } ???

Answer 1

如果要在插入Record时增加表，可以使用Identity和Presisted Concept自动递增

IF OBJECT_ID('TestTables', 'U') IS NOT NULL 
BEGIN
    DROP TABLE TestTables 
END

重置您要开始的身份

DBCC checkident ('TestTables', reseed, 93)

CREATE TABLE TestTables
(
    CreditCard AS ('CCARD-0000' + CAST(AutoIncId as varchar)) PERSISTED NOT NULL PRIMARY KEY,    
    [AutoIncId] INT IDENTITY NOT NULL,
    [Bank] VARCHAR(10)
);


INSERT INTO TestTables ([Bank]) VALUES ('Indus')
INSERT INTO TestTables ([Bank]) VALUES ('ICICI')
INSERT INTO TestTables ([Bank]) VALUES ('HDFC')
INSERT INTO TestTables ([Bank]) VALUES ('DBS')

SELECT * FROM TestTables

Answer 2

下一个值，固定长度，带前导＆＃39; 0＆＃39;：

SELECT 'CCARD-' + RIGHT(REPLICATE('0',6)+CAST(1+MAX(CAST(SUBSTRING(ccc.CreditCardCode,7, 6) as INT)) AS NVARCHAR(6)),6) 
FROM CustomerCreditCard ccc

Answer 3

这似乎可以解决问题

INSERT INTO CustomerCreditCard (CustomerCode, CreditCardCode, CreditCardDescription, NameOnCard, Address, City, State, PostalCode, Country, ExpMonth, ExpYear, Telephone, Email, IsActive,  ResidenceType, UserCreated, DateCreated, UserModified, DateModified, County, StartMonth, StartYear)
  SELECT c.CustomerCode, 
    (SELECT 'CCARD-' + REPLICATE('0', 6 - LEN((SELECT CAST(MAX(CAST(SUBSTRING(ccc.CreditCardCode,7, 6) as INT)) + 1 AS NVARCHAR(MAX)) FROM CustomerCreditCard ccc))) +
(SELECT CAST(MAX(CAST(SUBSTRING(ccc.CreditCardCode,7, 6) as INT)) + 1 AS NVARCHAR(MAX)) FROM CustomerCreditCard ccc)), 
    'Web Credit Card',
    c.CustomerName, 
    c.Address, 
    c.City, 
    c.State, 
    c.PostalCode, 
    c.Country, 
    'Jan', 
    2025, 
    c.Telephone, 
    c.Email, 
    1, 
    c.ResidenceType, 
    'webadmin', 
    GETDATE(), 
    'webadmin', 
    GETDATE(), 
    c.County, 
    'Jan',
    2010
    FROM Customer c
  WHERE c.CustomerCode = 'CUST-015056'

然后按顺序插入SQL

3 个答案: