Foreign Key Error 1005
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helping each other. Join them; it only takes a minute: Sign up MySQL Foreign Key Error 1005 errno 150 up vote 31 down vote favorite 8 I'm doing a small DataBase with MySQL Workbench. I have a main table, called "Immobili", which has a Primary Key composed by four columns: (Comune, Via, Civico, Immobile). Now, I also have error 1005 access denied three other tables, wich have the same primary key (Comune, Via, Civico, Immobile), but these fields are also referenced to the table Immobili. First question: Can I make a Primary Key that is also a Foreign Key? Second Question: When I try to export the changes it says: Executing SQL script in server # ERROR: Error 1005: Can't create table 'dbimmobili.condoni' (errno: 150) CREATE TABLE IF NOT EXISTS `dbimmobili`.`Condoni` ( `ComuneImmobile` VARCHAR(50) NOT NULL , `ViaImmobile` VARCHAR(50) NOT NULL , `CivicoImmobile` VARCHAR(5) NOT NULL , `InternoImmobile` VARCHAR(3) NOT NULL , `ProtocolloNumero` VARCHAR(15) NULL , `DataRichiestaSanatoria` DATE NULL , `DataSanatoria` DATE NULL , `SullePartiEsclusive` TINYINT(1) NULL , `SullePartiComuni` TINYINT(1) NULL , `OblazioneInEuro` DOUBLE NULL , `TecnicoOblazione` VARCHAR(45) NULL , `TelefonoTecnico` VARCHAR(15) NULL , INDEX `ComuneImmobile` (`ComuneImmobile` ASC) , INDEX `ViaImmobile` (`ViaImmobile` ASC) , INDEX `CivicoImmobile` (`CivicoImmobile` ASC) , INDEX `InternoImmobile` (`InternoImmobile` ASC) , PRIMARY KEY (`ComuneImmobile`, `ViaImmobile`, `CivicoImmobile`, `InternoImmobile`) , CONSTRAINT `ComuneImmobile` FOREIGN KEY (`ComuneImmobile` ) REFERENCES `dbimmobili`.`Immobile` (`ComuneImmobile` ) ON DELETE CASCADE ON UPDATE CASCADE, CONSTRAINT `ViaImmobile` FOREIGN KEY (`ViaI
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here for a quick overview of the site Help Center Detailed answers to any questions you might have http://stackoverflow.com/questions/34074739/mysql-error-1005-errno-150-foreign-key-constraint-is-incorrectly-formed Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, error 1005 just like you, helping each other. Join them; it only takes a minute: Sign up MySQL error 1005 errno 150 Foreign key constraint is incorrectly formed up vote 0 down vote favorite I have created the following tables: Stops: CREATE TABLE Stop ( routeNo DECIMAL (4,0) UNSIGNED, stopNo DECIMAL(3,0) UNSIGNED, latitude DECIMAL(19,16), longitude DECIMAL(19,16), CONSTRAINT PK_Location mysql error 1005 PRIMARY KEY (routeNo, stopNo), CONSTRAINT FK_stop_location FOREIGN KEY (latitude,longitude) REFERENCES Location(latitude,longitude), CONSTRAINT FK_stop_route FOREIGN KEY (routeNo) REFERENCES Route(routeNo) ); And the table WorkDay: CREATE TABLE Workday ( theDate DATE PRIMARY KEY, notes VARCHAR(30) ); I then try to create the table Order Delivery with the following code: CREATE TABLE OrderDelivery ( routeNo DECIMAL(4,0) UNSIGNED, stopNO DECIMAL(3,0) UNSIGNED, orderNo INT(9), CONSTRAINT pk_Orders PRIMARY KEY (routeNo, stopNo, orderNo), deliveryDateExpected DATE, deliveryTime TIME, customerName VARCHAR(40), creditCardNo CHAR(16) NOT NULL, customerRanking ENUM('platinum','gold','occasional','one-off'), CONSTRAINT fk_Routes FOREIGN KEY (routeNo) REFERENCES Stop(routeNo), CONSTRAINT fk_Stops FOREIGN KEY (stopNo) REFERENCES Stop(stopNo), CONSTRAINT fk_Dates FOREIGN KEY (deliveryDateExpected) REFERENCES Workday(theDate) ); However every time i try to create the OrderDelivery table it gives the error that the foreign key is incorrectly formed "SQL Error (1005): Can't create table 'harry.OrderDelivery' (errno:150)Foreign key constraint is incorrectly formed" How can i rectify this? mysql share|improve this question asked Dec 3 '15 at 19:40 HarAdams 92 add a comment| 1 Answer 1 active oldest votes up vote 0 down v