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POProblem with foreign keys in sql database
 

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  1. POProblem with foreign keys in sql database
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    <p>I have a school assignment that that is giving me and my friends headaches... So this is my queries that i have executed, one at a time ofc...</p> <pre><code>CREATE DATABASE GamblingSociety; USE GamblingSociety; CREATE TABLE GamblingDen ( Name VARCHAR (20) PRIMARY KEY, Address VARCHAR (50), Phone VARCHAR (10) ); CREATE TABLE Room ( RoomNr INT, GameCapaity INT, GamblingDenName VARCHAR (20), PRIMARY KEY (RoomNr, GamblingDenName), FOREIGN KEY (GamblingDenName) REFERENCES GamblingDen (Name) ); CREATE TABLE Employee ( SSN CHAR (11) PRIMARY KEY, Name VARCHAR (20), Address VARCHAR(50), Salary INT, isBoss BOOL, GamblingDenName VARCHAR (20), FOREIGN KEY (GamblingDenName) REFERENCES GamblingDen (Name) ); CREATE TABLE GameType ( Name VARCHAR (20) PRIMARY KEY, WinningProcentage FLOAT, ResponsibleEmployee CHAR (11), FOREIGN KEY (ResponsibleEmployee) REFERENCES Employee (SSN) ); CREATE TABLE Supplier ( Name VARCHAR (20) PRIMARY KEY, Address VARCHAR (50) ); CREATE TABLE SupplierOfGameType ( SupplierName VARCHAR (20), GameTypeName VARCHAR (20), PRIMARY KEY(SupplierName, GameTypeName), FOREIGN KEY (SupplierName) REFERENCES Supplier (Name), FOREIGN KEY (GameTypeName) REFERENCES GameType (Name) ); CREATE TABLE GamblingTable ( TableNr INT, RoomNr INT, GamblingDenName VARCHAR (20), GameTypeName VARCHAR (20), Comments VARCHAR (128), PRIMARY KEY (RoomNr, TableNr, GamblingDenName, GameTypeName), FOREIGN KEY (RoomNr, GamblingDenName) REFERENCES Room (RoomNr, GamblingDenName), FOREIGN KEY (GameTypeName) REFERENCES GameType (Name) ); CREATE TABLE Shylock ( Phone CHAR (10) PRIMARY KEY, Name VARCHAR (20), Contry CHAR (3) ); CREATE TABLE Customer ( SSN CHAR (11) PRIMARY KEY, Name VARCHAR (20), Phone CHAR (10), Address VARCHAR (50) ); </code></pre> <p>But this last query does not work:</p> <pre><code>USE GamblingSociety; CREATE TABLE GamblingInstance ( StartTime DATETIME, EndingTime DATETIME, GamblingDenName VARCHAR (20), TableNr INT, GameTypeName VARCHAR (20), Customer CHAR (11), Shylock CHAR (10), Debt INT, DebtPayed BOOL, DebtPayedDate DATETIME, PRIMARY KEY (StartTime, GameTypeName, Customer), FOREIGN KEY (GamblingDenName, TableNr, GameTypeName) REFERENCES GamblingTable (GamblingDenName, TableNr, GameTypeName), FOREIGN KEY (Customer) REFERENCES Customer (SSN), FOREIGN KEY (Shylock) REFERENCES Shylock (Phone) ); </code></pre> <p>It gives me this error: "Error Code: 1005. Can't create table 'gamblingsociety.gamblinginstance' (errno: 150)"</p> <p>if I replace this:</p> <pre><code>FOREIGN KEY (GamblingDenName, TableNr, GameTypeName) REFERENCES GamblingTable (GamblingDenName, TableNr, GameTypeName), </code></pre> <p>with this:</p> <pre><code>FOREIGN KEY (GameTypeName) REFERENCES GamblingTable (GameTypeName), </code></pre> <p>It works, so it's something with the GamblingDenName and TableNr.</p> <p>And i have google it and found a lot of tips, but nothing yeat have worked...</p> <p>So anyone with any idea?</p> <p>Thanks in advance!</p>
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    1. This table or related slice is empty.
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    1. USMockarutan
    1. USMockarutan
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. CODoes your code really have both `FORIEGN KEY` clauses to `GamblingTable` at the same time?
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      1. POProblem with foreign keys in sql database
      1. USmellamokb
    2. COOh, just saw that now... the first line should not be there... just a typo
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      1. POProblem with foreign keys in sql database
      1. USMockarutan
 

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