MySQL代碼中的錯誤代碼1217

我收到錯誤：Error 1217在我的MySQL代碼中。我MySQL代碼是MySQL代碼中的錯誤代碼1217

DROP TABLE IF EXISTS Formed; 
DROP TABLE IF EXISTS Album; 
DROP TABLE IF EXISTS Band; 
DROP TABLE IF EXISTS Customers; 
DROP TABLE IF EXISTS Track; 

CREATE TABLE Formed(
    FormedID int AUTO_INCREMENT, 
    YearFormed int, 
    CountryFormed varchar(50), 
    CityFormed varchar(50), 
    BandMembers varchar(400), 
    PRIMARY KEY(FormedID)) 
    ENGINE=InnoDB; 

CREATE TABLE Track (
    TrackID int AUTO_INCREMENT, 
    AlbumID int AUTO_INCREMENT, 
    Songs varchar (100), 
    TrackNumber varchar (20), 
    Title varchar (30), 
    TrackDuration varchar (4), 
    PRIMARY KEY (TrackID)) 
    ENGINE=InnoDB; 

CREATE TABLE Album(
    AlbumID int AUTO_INCREMENT, 
    TrackID int AUTO_INCREMENT, 
    BandID int AUTO_INCREMENT, 
    KEY(TrackID), 
    KEY(BandID), 
    Price varchar(5), 
    PublicationDate varchar(11), 
    Title varchar(30), 
    Genre varchar (36), 
    PRIMARY KEY(AlbumID)) 
    ENGINE=InnoDB; 

CREATE TABLE Band(
    BandID int AUTO_INCREMENT, 
    AlbumID int AUTO_INCREMENT, 
    KEY(AlbumID), 
    RecordLabel varchar(50), 
    PRIMARY KEY(BandID)) 
    ENGINE=InnoDB; 

CREATE TABLE Customers (
    CustomerID int AUTO_INCREMENT, 
    CName varchar (20), 
    CPhone int (11), 
    CEmail varchar (50), 
    CPPaid varchar (50), 
    CPDate date, 
    PRIMARY KEY (CustomerID)) 
    ENGINE=InnoDB; 

ALTER TABLE Track 
ADD FOREIGN KEY (AlbumID) REFERENCES Album(AlbumID)ON DELETE SET NULL ON UPDATE CASCADE; 

ALTER TABLE Album 
ADD FOREIGN KEY (TrackID) REFERENCES Track(TrackID)ON DELETE SET NULL ON UPDATE CASCADE; 

ALTER TABLE Album 
ADD FOREIGN KEY (BandID) REFERENCES Band(BandID)ON DELETE SET NULL ON UPDATE CASCADE; 

ALTER TABLE Band 
ADD FOREIGN KEY (AlbumID) REFERENCES Album(AlbumID)ON DELETE SET NULL ON UPDATE CASCADE;

而我得到的錯誤DROP TABLE IF EXISTS AlbumError Code: 1217. Cannot delete or update a parent row: a foreign key constraint fails，也恰好爲其他DROP TABLE IF EXISTS線。我是新手，在MySQL腳本中使用Foreign Keys，我不知道爲什麼我會收到這些錯誤。如果任何人都可以幫助我解決這個問題，將不勝感激。我已經嘗試了所有可以通過以下鏈接Bogus foreign key constraint fail

來源

2016-04-14 smitthy

您可能必須以不同的順序砸他們避免違反外鍵約束，首先刪除外鍵，甚至禁用外鍵。 – tadman

@tadman我剛剛將它們從代碼中註釋掉了，它仍然在發生 – smitthy

@Siguza這不是重複的，因爲我已經嘗試了所有給出的答案，它仍然不起作用 – smitthy

腳本即可找到答案，但在此之前Dropping表，儘量去除Foreign Key References

來源

2016-04-14 17:57:16

因此，這將是沿線：'ALTER TABLE Track ADD FOREIGN KEY（AlbumID）;'？ – smitthy

您使用的是phpmyadmin還是workbench？還是Consol！？ –

我正在使用MySQL工作臺 – smitthy

MySQL代碼中的錯誤代碼1217

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