Cricket Manager的SQL查询

Question

我有一张2桌

TEAMS -TeamId,TeamName,Country
Players-PlayerID,PlayerName,TotalScore,ToTalMatch,TotalRuns,AvgRunRate.

现在我要创建一个TEAMPLAYERS ...表，它必须包含TEAMID，PlayerId ...如果在TEAMS，PLAYERS表中删除了详细信息，那么数据必须在THIRD TABLE ... PLS HELP ME中删除

Answer 1

以下是使用cascade delete创建具有外键约束的表的方法。

CREATE TABLE TEAMPLAYERS (
.....
teamId int(11) NOT NULL,
playerId int(11) NOT NULL,
FOREIGN KEY(teamId)
REFERENCES TEAMS(teamId)
ON DELETE CASCADE,
FOREIGN KEY(playerId)
REFERENCES PLAYERS(playerId)
ON DELETE CASCADE
.....
);

注意：......将在TEAMPLAYERS表上填充其他所需的列/约束。 另外，请参阅另一篇文章，其中提出了类似的问题MySQL foreign key constraints, cascade delete

希望这有帮助！