SQL DB作成エラー

Question

ブール値としてBIT DEFAULT 0,を使用しました。まあ、問題は、FKに問題があるので、テーブルを作成できないということです。どうしてですか？私はまた、より良い見通しのためにERD Imageを追加しました。

多分誰かがとても素敵で、私にそれを説明することができます。

誰かがMSSQLコードまたはMySQLコードへのturtnind ERD用の良いプログラムやオンラインサンドボックスを知っているのでしょうか？無料で使えればいいですね。前もって感謝します！

CREATE DataBase LO; 
GO 
USE LO; 

CREATE TABLE Weapon 
(
    ClassWeapon CHAR(50) NULL, 
    Level INT NULL, 
    MinDmg INT NULL, 
    MaxDmg INT NULL, 
    AtkSpeed NUMERIC(3,2) NULL, 
    PerSecondDmg NUMERIC(6,2) NULL, 
    PlayerLevel INT NULL, 
    SkillLevel INT NULL, 
    Image BIT DEFAULT 0 NULL, 
    Name CHAR(100) NULL, 
    Weapons CHAR(50) NOT NULL, 
    Monsters CHAR(50) NULL, 
    PRIMARY KEY (Weapons), 
    FOREIGN KEY (Monsters) REFERENCES Monster(Monsters) 
); 

CREATE TABLE Armor 
(
    ClassArmor CHAR(50) NULL, 
    Name CHAR(100) NULL, 
    Level INT NULL, 
    Defense INT NULL, 
    Image BIT DEFAULT 0 NULL, 
    Armors CHAR(50) NOT NULL, 
    Monsters CHAR(50) NULL, 
    PRIMARY KEY (Armors), 
    FOREIGN KEY (Monsters) REFERENCES Monster(Monsters) 
); 

CREATE TABLE Menu 
(
    Weapons CHAR(50) NULL, 
    Armors CHAR(50) NULL, 
    Monsters CHAR(50) NULL, 
    FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons), 
    FOREIGN KEY (Armors) REFERENCES Armor(Armors), 
    FOREIGN KEY (Monsters) REFERENCES Monster(Monsters) 
); 

CREATE TABLE Monster 
(
    Name CHAR(100) NULL, 
    Level INT NULL, 
    MinHealth INT NULL, 
    MaxHealth INT NULL, 
    MinDmg INT NULL, 
    MaxDmg INT NULL, 
    AtkSpeed NUMERIC(3,2) NULL, 
    Location CHAR(100) NULL, 
    Monsters CHAR(50) NOT NULL, 
    DropItems CHAR(100) NULL, 
    Image BIT DEFAULT 0 NULL, 
    PRIMARY KEY (Monsters), 
    FOREIGN KEY (DropItems) REFERENCES Items(DropItems) 
); 

CREATE TABLE Items 
(
    DropItems CHAR(100) NOT NULL, 
    Weapons CHAR(50) NULL, 
    Armors CHAR(50) NULL, 
    PRIMARY KEY (DropItems), 
    FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons), 
    FOREIGN KEY (Armors) REFERENCES Armor(Armors) 
); 

Answer 1

さて、問題はFKに問題があるので、私は任意のテーブルを作成することができないということである、なぜ取得いけませんか？

単に存在しないオブジェクトは参照できません。

あなたは最初のテーブルを作成し、FK関係を追加する必要があります。それはテーブルを追加し、FKを変えることで働いていた方法をここでlad2025

@

CREATE DataBase LO; 
GO 
USE LO; 

CREATE TABLE Weapon 
(
    ClassWeapon CHAR(50) NULL, 
    Level INT NULL, 
    MinDmg INT NULL, 
    MaxDmg INT NULL, 
    AtkSpeed NUMERIC(3,2) NULL, 
    PerSecondDmg NUMERIC(6,2) NULL, 
    PlayerLevel INT NULL, 
    SkillLevel INT NULL, 
    Image BIT DEFAULT 0 NULL, 
    Name CHAR(100) NULL, 
    Weapons CHAR(50) NOT NULL, 
    Monsters CHAR(50) NULL, 
    PRIMARY KEY (Weapons), 
    --FOREIGN KEY (Monsters) REFERENCES Monster(Monsters) 
); 

CREATE TABLE Armor 
(
    ClassArmor CHAR(50) NULL, 
    Name CHAR(100) NULL, 
    Level INT NULL, 
    Defense INT NULL, 
    Image BIT DEFAULT 0 NULL, 
    Armors CHAR(50) NOT NULL, 
    Monsters CHAR(50) NULL, 
    PRIMARY KEY (Armors), 
---- FOREIGN KEY (Monsters) REFERENCES Monster(Monsters) 
); 

CREATE TABLE Menu 
(
    Weapons CHAR(50) NULL, 
    Armors CHAR(50) NULL, 
    Monsters CHAR(50) NULL, 
    --FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons), 
-- FOREIGN KEY (Armors) REFERENCES Armor(Armors), 
-- FOREIGN KEY (Monsters) REFERENCES Monster(Monsters) 
); 

CREATE TABLE Monster 
(
    Name CHAR(100) NULL, 
    Level INT NULL, 
    MinHealth INT NULL, 
    MaxHealth INT NULL, 
    MinDmg INT NULL, 
    MaxDmg INT NULL, 
    AtkSpeed NUMERIC(3,2) NULL, 
    Location CHAR(100) NULL, 
    Monsters CHAR(50) NOT NULL, 
    DropItems CHAR(100) NULL, 
    Image BIT DEFAULT 0 NULL, 
    PRIMARY KEY (Monsters), 
    --FOREIGN KEY (DropItems) REFERENCES Items(DropItems) 
); 

CREATE TABLE Items 
(
    DropItems CHAR(100) NOT NULL, 
    Weapons CHAR(50) NULL, 
    Armors CHAR(50) NULL, 
    PRIMARY KEY (DropItems), 
    --FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons), 
-- FOREIGN KEY (Armors) REFERENCES Armor(Armors) 
); 

ALTER TABLE Weapon 
ADD FOREIGN KEY (Monsters) REFERENCES Monster(Monsters); 

ALTER TABLE Armor 
ADD FOREIGN KEY (Monsters) REFERENCES Monster(Monsters); 

ALTER TABLE Menu 
ADD 
    FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons), 
    FOREIGN KEY (Armors) REFERENCES Armor(Armors), 
    FOREIGN KEY (Monsters) REFERENCES Monster(Monsters); 

ALTER TABLE Monster 
ADD FOREIGN KEY (DropItems) REFERENCES Items(DropItems); 

ALTER TABLE Items 
ADD FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons), 
FOREIGN KEY (Armors) REFERENCES Armor(Armors); 

Answer 2

感謝を。

CREATE DataBase LO; 
GO 
USE LO; 

CREATE TABLE Weapon 
(
    ClassWeapon CHAR(50) NULL, 
    Level INT NULL, 
    MinDmg INT NULL, 
    MaxDmg INT NULL, 
    AtkSpeed NUMERIC(3,2) NULL, 
    PerSecondDmg NUMERIC(6,2) NULL, 
    PlayerLevel INT NULL, 
    SkillLevel INT NULL, 
    Image BIT DEFAULT 0 NULL, 
    Name CHAR(100) NULL, 
    Weapons CHAR(50) NOT NULL, 
    Monsters CHAR(50) NULL, 
    PRIMARY KEY (Weapons) 
); 
ALTER TABLE Weapon ADD FOREIGN KEY (Monsters) REFERENCES Monster(Monsters); 

CREATE TABLE Armor 
(
    ClassArmor CHAR(50) NULL, 
    Name CHAR(100) NULL, 
    Level INT NULL, 
    Defense INT NULL, 
    Image BIT DEFAULT 0 NULL, 
    Armors CHAR(50) NOT NULL, 
    Monsters CHAR(50) NULL, 
    PRIMARY KEY (Armors) 
); 
ALTER TABLE Armor ADD FOREIGN KEY (Monsters) REFERENCES Monster(Monsters); 

CREATE TABLE Menu 
(
    Weapons CHAR(50) NULL, 
    Armors CHAR(50) NULL, 
    Monsters CHAR(50) NULL 
); 
ALTER TABLE Menu ADD FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons); 
ALTER TABLE Menu ADD FOREIGN KEY (Armors) REFERENCES Armor(Armors); 
ALTER TABLE Menu ADD FOREIGN KEY (Monsters) REFERENCES Monster(Monsters); 

CREATE TABLE Monster 
(
    Name CHAR(100) NULL, 
    Level INT NULL, 
    MinHealth INT NULL, 
    MaxHealth INT NULL, 
    MinDmg INT NULL, 
    MaxDmg INT NULL, 
    AtkSpeed NUMERIC(3,2) NULL, 
    Location CHAR(100) NULL, 
    Monsters CHAR(50) NOT NULL, 
    DropItems CHAR(100) NULL, 
    Image BIT DEFAULT 0 NULL, 
    PRIMARY KEY (Monsters) 
); 
ALTER TABLE Monster ADD FOREIGN KEY (DropItems) REFERENCES Items(DropItems); 

CREATE TABLE Items 
(
    DropItems CHAR(100) NOT NULL, 
    Weapons CHAR(50) NULL, 
    Armors CHAR(50) NULL, 
    PRIMARY KEY (DropItems) 
); 
ALTER TABLE Items ADD FOREIGN KEY (Weapons) REFERENCES Weapon(Weapons); 
ALTER TABLE Items ADD FOREIGN KEY (Armors) REFERENCES Armor(Armors);