自动递增的用户定义ID [英] Auto Incremented userdefined id

问题描述

您好，谁能给我一个想法，如何创建一个自动生成的ID(如ED01，ED02等)，以便在我输入数据时，该ID应该自动递增

Hi can anyone give me an idea how to create an auto generated id like ED01,ED02 etc., so that when i am entering data the id should be automatically incremented

推荐答案

私有静态int EmpId ="ED00";

表格加载

private static int EmpId = "ED00";

Form load

visitCounter++;

   textBox1.Text = visitCounter;

这将自动增加值，但如果再次关闭应用程序，它将从启动开始.

This will automatically increment the vale but if you close the application again it will take from starting.

create  TABLE ED(
  ID INTEGER PRIMARY KEY IDENTITY(1, 1)
  , UserID AS 'ED' + CAST(ID AS VARCHAR(32))
  , I INTEGER
)


DECLARE @I INTEGER
SET @I = 0
WHILE @I < 100
BEGIN
  SET @I = @I + 1
  INSERT INTO ED VALUES (@I)
END

根据您的要求尝试此操作

Try this as per your requirement

CREATE



TABLE user(id INT NOT NULL IDENTITY(1,1),

col

AS 'ED'+

RIGHT(




'0'+CAST(id AS VARCHAR(2)),2))

INSERT



INTO userDEFAULT VALUES

SELECT




* FROM user

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