c# - 根据列值生成序列号

Question

我想根据列值生成一个序列号。我想要这种输出。我将在 c# .net winform 中使用它作为 GridView 输出

TABLE1

ID        Name      NoStub
 1        arte        3
 2       gonzake      2


TABLE2

ID      Name        StubNumberStart          StubNumberEnd
 1      arte           0001                      0003
 2      gonzake        0004                      0005   

Answer 1

ALTER PROCEDURE ExpandIt
AS
BEGIN
SET NOCOUNT ON;

DECLARE @Id int;
DECLARE @name varchar(50);
DECLARE @noStub int;

DECLARE @stubNumber char(8);
DECLARE @count as int = 0;
DECLARE @continuedID as int = 0;

DECLARE t1 CURSOR FAST_FORWARD FOR 
SELECT ID, Name,NoStub from Table1

OPEN t1 
FETCH NEXT FROM t1 INTO @Id, @name, @noStub

WHILE @@FETCH_STATUS = 0
BEGIN
  WHILE (@count < @noStub)
  BEGIN
    SET @count = @count + 1;
    SET @stubNumber = ('0000' + CONVERT (CHAR, @continuedID + @count));
    SET @stubNumber = SUBSTRING (@stubNumber,LEN(@stubNumber)-4+1, 4);

    INSERT INTO Table2 (ID, Name, StubNumber)
    VALUES (@Id, @name,@stubNumber); 
  END
  SET @continuedID = @count;
  SET @count = 0;
  FETCH NEXT FROM t1 INTO @Id, @name, @noStub
END

CLOSE t1 ;
DEALLOCATE t1
END

Answer 2

试试这个查询..它会给出表 2 到表 1 的结果

DECLARE @T1 AS TABLE (ID INT, NAME VARCHAR(50), STUBNUMBER VARCHAR(10))
INSERT INTO @T1 VALUES ( 1, 'ARTE', '001')
INSERT INTO @T1 VALUES ( 1, 'ARTE', '002')
INSERT INTO @T1 VALUES ( 1, 'ARTE', '003')

INSERT INTO @T1 VALUES ( 1, 'GONZAKE', '004')
INSERT INTO @T1 VALUES ( 1, 'GONZAKE', '005')



SELECT * FROM @T1

SELECT DISTINCT ID ,NAME, COUNT(*) AS NOSTUB FROM @T1
GROUP BY ID, NAME

如果您的要求与表 1 到表 2 不同，请告诉我.. 您将收到新的查询...