Question

我有一张名为tblEmployeeNominees的桌子，这张桌子是我们可以为一名雇员提供多名被提名人的雇员的被提名成员，我想显示该雇员的被提名成员的代号。如果一名员工有两名被提名人，那么该员工的序列号必须显示为1,2 如果超过2或更多则必须显示1,2,3，..........

Answer 1

SELECT *, ROW_NUMBER() OVER (PARTITION BY Employee ORDER BY Nominee)
FROM tblEmployeeNominees;

Answer 2

看看这个。适用于sql server 2005

DECLARE @Table TABLE(
        EmpID INT,
        NomineeID INT
)

INSERT INTO @Table (EmpID,NomineeID) SELECT 1, 1
INSERT INTO @Table (EmpID,NomineeID) SELECT 1, 2
INSERT INTO @Table (EmpID,NomineeID) SELECT 2, 1
INSERT INTO @Table (EmpID,NomineeID) SELECT 3, 1
INSERT INTO @Table (EmpID,NomineeID) SELECT 3, 2
INSERT INTO @Table (EmpID,NomineeID) SELECT 3, 3

;WITH Serials AS (
    SELECT  EmpID,
            MIN(NomineeID) MinNomineeID,
            CAST(MIN(NomineeID) AS VARCHAR(MAX)) Serial
    FROM    @Table
    GROUP BY EmpID
    UNION ALL
    SELECT  t.EmpID,
            t.NomineeID,
            s.Serial + ',' + CAST(NomineeID AS VARCHAR(MAX)) Serial
    FROM    @Table t INNER JOIN
            Serials s   ON  t.EmpID = s.EmpID
                        AND t.NomineeID > s.MinNomineeID
)
SELECT  Serials.EmpID,
        Serials.Serial
FROM    Serials INNER JOIN
        (
            SELECT  EmpID,
                    MAX(LEN(Serial)) LenSerial
            FROM    Serials
            GROUP BY EmpID
        ) Lens ON Serials.EmpID = Lens.EmpID
WHERE   LEN(Serials.Serial) = Lens.LenSerial
ORDER BY 1
OPTION (MAXRECURSION 0)

生成序列号

2 个答案: