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我有这样的表结构

GameID     Player1  Player2   Player3     Player4     Player5      conrti_P1   Contri_P2   Conrti_P3 Contri_P4   Contri_P5 

1             1        2         3          4           5              0           0         0           0         0

2             2        1         5          3           4              0           0        0            0        0

Player1 到 Player5 列包含玩家 ID。Contri_p1 到 Contri_p5 列包含它们的点值（最初为 0 表示 all ）。现在我想更新玩家的积分。例如，我想在 gameID = 1 中更新玩家 id = 4 的点数。玩家 id 的位置不是每次都固定的。我需要搜索和更新。

我怎样才能做到这一点？

4

1 回答 1

3

我不会尝试想出一些聪明的（阅读复杂的）方法来尝试将您的更新塞进您当前的设计中，但会改变您的表格的设计。

BEGIN TRAN

CREATE TABLE Games (GameID INT PRIMARY KEY)
CREATE TABLE Players (PlayerID INT PRIMARY KEY)
CREATE TABLE PlayersGames (GameID INT, PlayerID INT, Position INT, conrti INT)

INSERT INTO Games VALUES (1), (2)
INSERT INTO Players VALUES (1), (2), (3), (4), (5)
INSERT INTO PlayersGames VALUES (1,1,1,0), (1,2,2,0), (1,3,3,0), (1,4,4,0), (1,5,5,0), (2,2,1,0), (2,1,2,0), (2,5,3,0), (2,3,4,0), (2,4,5,0)

ROLLBACK TRAN

现在你UPDATE可以像

UPDATE PlayersGames SET contri = @YourValue WHERE PlayerID = 4 AND GameID = 1

编辑
为了完整起见，整个脚本，包括根据您的问题显示结果可能如下所示

BEGIN TRAN

CREATE TABLE dbo.Games (GameID INT PRIMARY KEY)
CREATE TABLE dbo.Players (PlayerID INT PRIMARY KEY)
CREATE TABLE dbo.PlayersGames (GameID INT, PlayerID INT, Position INT, contri INT)
ALTER TABLE dbo.PlayersGames ADD CONSTRAINT FK_PLAYERSGAMES_PLAYERS FOREIGN KEY (PlayerID) REFERENCES dbo.Players(PlayerID)
ALTER TABLE dbo.PlayersGames ADD CONSTRAINT FK_PLAYERSGAMES_GAMES FOREIGN KEY (GameID) REFERENCES dbo.Games(GameID)

INSERT INTO Games VALUES (1), (2)
INSERT INTO Players VALUES (1), (2), (3), (4), (5)
INSERT INTO PlayersGames VALUES (1,1,1,0), (1,2,2,3), (1,3,3,0), (1,4,4,0), (1,5,5,0), (2,2,1,0), (2,1,2,0), (2,5,3,0), (2,3,4,0), (2,4,5,0)

SELECT  GameID
        , Player1 = MIN(CASE WHEN Position = 1 THEN PlayerID ELSE NULL END)
        , Player2 = MIN(CASE WHEN Position = 2 THEN PlayerID ELSE NULL END)
        , Player3 = MIN(CASE WHEN Position = 3 THEN PlayerID ELSE NULL END)
        , Player4 = MIN(CASE WHEN Position = 4 THEN PlayerID ELSE NULL END)
        , Player5 = MIN(CASE WHEN Position = 5 THEN PlayerID ELSE NULL END)
        , contri_P1 = MIN(CASE WHEN Position = 1 THEN contri ELSE NULL END)
        , contri_P2 = MIN(CASE WHEN Position = 2 THEN contri ELSE NULL END)
        , contri_P3 = MIN(CASE WHEN Position = 3 THEN contri ELSE NULL END)
        , contri_P4 = MIN(CASE WHEN Position = 4 THEN contri ELSE NULL END)
        , contri_P5 = MIN(CASE WHEN Position = 5 THEN contri ELSE NULL END)
FROM    PlayersGames
GROUP BY
        GameID

ROLLBACK TRAN
于 2012-06-15T06:47:19.983 回答