Im trying to create a database in mysql, the first bit of my code works fine but then i get a syntax error on:
CREATE TABLE Project_Staff (
empID INT NOT NULL,
projID INT NOT NULL,
CONSTRAINT
i dont understand where is the error.
Here is my code:
CREATE TABLE Employees (
empID INT NOT NULL AUTO_INCREMENT,
empSurname VARCHAR(255) NOT NULL,
empLastname VARCHAR(255) NOT NULL,
empJobtitle VARCHAR(255) NOT NULL,
empLinemanager VARCHAR(255) NOT NULL,
CONSTRAINT pk_employees PRIMARY KEY (empID)
) ENGINE=InnoDB;
CREATE TABLE Skills (
sklID INT NOT NULL AUTO_INCREMENT,
sklName VARCHAR(255) NOT NULL,
CONSTRAINT pk_skills PRIMARY KEY (sklID)
) ENGINE = InnoDB;
CREATE TABLE Employees_Skills (
empskID INT NOT NULL AUTO_INCREMENT,
empskLevel INT NOT NULL,
sklID INT NOT NULL,
empID INT NOT NULL,
CONSTRAINT fk_employees_skills FOREIGN KEY (sklID) REFERENCES Skills(sklID),
CONSTRAINT fk_employees_skills_1 FOREIGN KEY (empID) REFERENCES Employees(empID),
CONSTRAINT pk_employees_skills PRIMARY KEY (empskID)
) ENGINE = InnoDB;
CREATE TABLE Project (
projID INT NOT NULL AUTO_INCREMENT,
projName VARCHAR(255) NOT NULL,
projDuration INT NOT NULL,
projStartdate VARCHAR (255) NOT NULL,
CONSTRAINT pk_project PRIMARY KEY (projID)
) ENGINE = InnoDB
CREATE TABLE Project_Staff (
empID INT NOT NULL,
projID INT NOT NULL,
CONSTRAINT fk_project_staff FOREIGN KEY (empID) REFERENCES Employees(empID),
CONSTRAINT fk_project_staff FOREIGN KEY (projID) REFERENCES Project(projID)
) ENGINE = InnoDB
CREATE TABLE Skill_For_Project (
sklreqDuration INT NOT NULL,
projID INT NOT NULL,
sklID INT NOT NULL,
CONSTRAINT fk_skill_for_project FOREIGN KEY (sklID) REFERENCES Skills(empID),
CONSTRAINT fk_skill_for_project FOREIGN KEY (projID) REFERENCES Project (projID)
) ENGINE = InnoDB
you have Duplicate key name 'fk_project_staff':
Duplicate key name 'fk_skill_for_project':
mising empID in skills table. you may interested in Employees(empID) in Skill_For_Project table.
You have misses Semicolon at the end of Create Table Statement
here full working code
CREATE TABLE Employees (
empID INT NOT NULL AUTO_INCREMENT,
empSurname VARCHAR(255) NOT NULL,
empLastname VARCHAR(255) NOT NULL,
empJobtitle VARCHAR(255) NOT NULL,
empLinemanager VARCHAR(255) NOT NULL,
CONSTRAINT pk_employees PRIMARY KEY (empID)
) ENGINE=InnoDB;
CREATE TABLE Skills (
sklID INT NOT NULL AUTO_INCREMENT,
sklName VARCHAR(255) NOT NULL,
CONSTRAINT pk_skills PRIMARY KEY (sklID)
) ENGINE = InnoDB;
CREATE TABLE Employees_Skills (
empskID INT NOT NULL AUTO_INCREMENT,
empskLevel INT NOT NULL,
sklID INT NOT NULL,
empID INT NOT NULL,
CONSTRAINT fk_employees_skills FOREIGN KEY (sklID) REFERENCES Skills(sklID),
CONSTRAINT fk_employees_skills_1 FOREIGN KEY (empID) REFERENCES Employees(empID),
CONSTRAINT pk_employees_skills PRIMARY KEY (empskID)
) ENGINE = InnoDB;
CREATE TABLE Project (
projID INT NOT NULL AUTO_INCREMENT,
projName VARCHAR(255) NOT NULL,
projDuration INT NOT NULL,
projStartdate VARCHAR (255) NOT NULL,
CONSTRAINT pk_project PRIMARY KEY (projID)
) ENGINE = InnoDB;
CREATE TABLE Project_Staff (
empID INT NOT NULL,
projID INT NOT NULL,
CONSTRAINT fk_project_staff FOREIGN KEY (empID) REFERENCES Employees(empID),
CONSTRAINT fk_project_staff2 FOREIGN KEY (projID) REFERENCES Project(projID)
) ENGINE = InnoDB;
CREATE TABLE Skill_For_Project (
sklreqDuration INT NOT NULL,
projID INT NOT NULL,
sklID INT NOT NULL,
CONSTRAINT fk_skill_for_project FOREIGN KEY (sklID) REFERENCES Employees(empID),
CONSTRAINT fk_skill_for_project2 FOREIGN KEY (projID) REFERENCES Project(projID)
) ENGINE = InnoDB;
http://sqlfiddle.com/#!2/d75182
As far I see, there are two issues
You missed a semicolon after create project table
CREATE TABLE Project
( projID INT NOT NULL AUTO_INCREMENT,
CONSTRAINT pk_project
PRIMARY KEY (projID) ) ENGINE = InnoDB; <-- Here
Both your constraint names (like fk_project_staff in Project_Staff table and fk_skill_for_project in Skill_For_Project table) are same; Try giving them a different name
Related
The first 4 table are created fine, the transactions tables run into problem. I get the 1215 error: cannot add foreign key. I've checked an rechecked the data types, and made sure all FK are PK of their own tables. What's wrong here?
CREATE SCHEMA FinalDB;
CREATE TABLE `User` (
userId int not null auto_increment primary key,
first_name varchar(255) not null,
last_name varchar(255) not null,
address varchar(255) null,
DOB date not null,
availableBalance int not null default 0,
currency varchar(20)
);
CREATE TABLE Verifications(
userId int not null primary key,
passport int null,
ssn int null,
license int null,
constraint
foreign key (userId)
references User(userId)
);
CREATE TABLE Linked_Account(
account_Id int not null,
userId int not null,
routing int null,
swift int null,
primary key (userId, account_Id),
constraint
foreign key (userId)
references User(userId)
);
CREATE TABLE Wallet (
userId int not null,
walletId varchar(5) not null,
coinAmount int not null default 0,
netWorth int not null default 0,
primary key(userId, walletId),
constraint
foreign key (userId)
references `User`(userId)
);
CREATE TABLE Transactions (
transactionId int not null primary key auto_increment,
userId int not null,
type varchar(30) not null,
walletId varchar(5) not null,
payment_method int null, #optional
total int null, #optional
quantity int not null,
fee int null, #optional
`date` date not null,
sender varchar(50) null, #optional
reciever varchar(50) null, #optional
status varchar(20) not null,
notes varchar(200) null, #optional
constraint
foreign key (userId)
references `User`(userId)
ON DELETE CASCADE ON UPDATE CASCADE,
constraint
foreign key (walletId)
references Wallet(walletId)
ON DELETE CASCADE ON UPDATE CASCADE,
constraint
foreign key (payment_method)
references Linked_Account(account_id)
);
CREATE TABLE TransactionsExchange(
transactionId int not null auto_increment primary key,
userId int not null,
currencyFrom int not null,
currencyFromAmount int not null,
currencyInto int not null,
currencyIntoEquivalent int not null,
notes varchar(200) null,
`date` date not null,
constraint
foreign key (userId)
references User(userId),
constraint
foreign key (currencyFrom)
references Wallet(walletId),
constraint
foreign key (currencyInto)
references Wallet(walletId)
);
I've look online for possible answer, but it's usually having to do with inconsistent data types or undeclared PK's. I'm basically trying to make a transactions table to log various different data in different compositions. Using backend logic to handle what is required and what is not, aside from a few defaults.
To use a compound Primary Key as Foreign Key, you'll have to add the
same number of columns (that compose the PK) with same datatypes to
the child table and then use the combination of these columns in the
FOREIGN KEY definition.
see related post here https://stackoverflow.com/a/10566463/4904726
Try this 'Transactions' table creating query:
CREATE TABLE Transactions (
transactionId int not null primary key auto_increment,
userId int not null,
type varchar(30) not null,
walletId varchar(5) not null,
payment_method int null, #optional
total int null, #optional
quantity int not null,
fee int null, #optional
`date` date not null,
sender varchar(50) null, #optional
reciever varchar(50) null, #optional
status varchar(20) not null,
notes varchar(200) null, #optional
constraint
foreign key (userId)
references `User`(userId)
ON DELETE CASCADE ON UPDATE CASCADE,
constraint
foreign key (userId, walletId)
references Wallet(userId, walletId)
ON DELETE CASCADE ON UPDATE CASCADE,
constraint
foreign key (userId, payment_method)
references Linked_Account(userId, account_id)
);
I'm trying to create a database using MySQL and having difficulties with my code. I created the base table with one attribute that I plan on using as a foreign key in another table but an error message comes up saying I cannot create the table. I only want help with creating that table as I know how to insert data.
create database aerogames_table;
CREATE TABLE
O_DETAILS
(
B_Number INT NOT NULL,
B_Name VARCHAR(60) NOT NULL,
Order_ID INT NOT NULL,
Order_CName VARCHAR(50) NOT NULL
)
engine=innodb;
CREATE TABLE
P_DETAILS
(
PRO_ID INT NOT NULL PRIMARY KEY,
Order_ID INT NOT NULL,
CONSTRAINT fk_OrdID_this FOREIGN KEY (Order_ID) REFERENCES O_DETAILS(Order_ID),
PRO_Seller VARCHAR (50) NOT NULL,
PRO_Name VARCHAR (50) NOT NULL,
PRO_Year INT NOT NULL,
PRO_Price INT NOT NULL
)
engine=innodb;
1005 - Can't create table 'aerogames_table.p_details' (errno: 150)
Due to this https://dev.mysql.com/doc/refman/5.6/en/create-table-foreign-keys.html
[CONSTRAINT [symbol]]
FOREIGN KEY [index_name] (index_col_name, ...)
REFERENCES tbl_name (index_col_name,...)
Foreign key need to reference to index column (no need to be primary key) so you need to create index on O_DETAILS.Order_ID like this
CREATE TABLE
O_DETAILS
(
B_Number INT NOT NULL,
B_Name VARCHAR(60) NOT NULL,
Order_ID INT NOT NULL,
Order_CName VARCHAR(50) NOT NULL,
KEY (Order_ID)
)
engine=innodb;
CREATE TABLE
P_DETAILS
(
PRO_ID INT NOT NULL PRIMARY KEY,
Order_ID INT NOT NULL,
CONSTRAINT fk_OrdID_this FOREIGN KEY (Order_ID) REFERENCES O_DETAILS(Order_ID),
PRO_Seller VARCHAR (50) NOT NULL,
PRO_Name VARCHAR (50) NOT NULL,
PRO_Year INT NOT NULL,
PRO_Price INT NOT NULL
)
engine=innodb;
Certainly if you make O_DETAILS.Order_ID to be primary key, it will also create for you and this works
Here is the code below, I'm not sure what this error means...
All I know is that it has something to do with the employeeshifts table.
Does it have something to do with foreign keys?
(insterting this text as I have nothing else to say, but stack requires a lot of text)
CREATE TABLE Customer (
CustomerID INT AUTO_INCREMENT,
Name VARCHAR(90) NOT NULL,
Phone VARCHAR(45) NULL,
CustomerAddress VARCHAR(45) NOT NULL,
PRIMARY KEY (CustomerID));
CREATE TABLE Location (
Address VARCHAR(100) NOT NULL,
Latitude VARCHAR(45) NULL DEFAULT ' ',
Longitude VARCHAR(45) NULL,
PRIMARY KEY (Address));
CREATE TABLE Employee (
EmployeeID INT AUTO_INCREMENT,
Name VARCHAR(90) NOT NULL,
PRIMARY KEY (EmployeeID));
CREATE TABLE Truck (
LicensePlate CHAR(20) NOT NULL,
color VARCHAR(45) NULL,
capacity VARCHAR(45) NULL,
PRIMARY KEY (LicensePlate));
CREATE TABLE Shifts (
ShiftTime DATETIME NOT NULL,
PRIMARY KEY (ShiftTime));
CREATE TABLE EmployeeShifts (
DesiredShift DATETIME NOT NULL,
EmployeeWorking VARCHAR(90) NOT NULL,
DateOfShift DATE,
PRIMARY KEY(DesiredShift, EmployeeWorking, DateOfShift),
FOREIGN KEY (EmployeeWorking) REFERENCES Employee(Name),
FOREIGN KEY (DesiredShift) REFERENCES Shifts(ShiftTime));
CREATE TABLE Reservation (
ReservNum INT NOT NULL,
ReserveDate DATE NULL,
PickupTime VARCHAR(45) NOT NULL,
NumOfPassengers INT NULL,
sheduledTime VARCHAR(45) NULL,
ActualPickupTime VARCHAR(45),
ActualTime VARCHAR(45),
PricePaid VARCHAR(45),
DriverHourlyRate DECIMAL(7,2) NOT NULL,
PassEmployeeHourlyRate DECIMAL (7,2) NOT NULL,
DriverSalary VARCHAR(10),
PassEmployeeSalary VARCHAR(10),
Customer_CustomerID INT,
Truck_LicensePlate char(20) NOT NULL,
Employee_EmployeeID_Driver INT,
Location_Address_Pickup VARCHAR(100),
Employee_EmployeeID_Passenger INT,
Location_Address_Drop VARCHAR(100),
PRIMARY KEY (ReservNum),
FOREIGN KEY (Customer_CustomerID) REFERENCES Customer (CustomerID),
FOREIGN KEY (Truck_LicensePlate) REFERENCES Truck (LicensePlate),
FOREIGN KEY (Employee_EmployeeID_Driver) REFERENCES Employee (EmployeeID),
FOREIGN KEY (Location_Address_Pickup) REFERENCES Location (Address),
FOREIGN KEY (Employee_EmployeeID_Passenger) REFERENCES Employee (EmployeeID),
FOREIGN KEY (Location_Address_Drop) REFERENCES Location (Address));
You need to reference UNIQUE or PRIMARY KEY column:
CREATE TABLE EmployeeShifts (
DesiredShift DATETIME NOT NULL,
EmployeeWorking VARCHAR(90) NOT NULL,
DateOfShift DATE,
PRIMARY KEY(DesiredShift, EmployeeWorking, DateOfShift),
FOREIGN KEY (EmployeeWorking) REFERENCES Employee(Name), -- name is not UNIQUE/PK
FOREIGN KEY (DesiredShift) REFERENCES Shifts(ShiftTime)
);
to:
CREATE TABLE EmployeeShifts (
DesiredShift DATETIME NOT NULL,
EmployeeID INT NOT NULL, -- here
DateOfShift DATE,
PRIMARY KEY(DesiredShift, EmployeeID, DateOfShift),
FOREIGN KEY (EmployeeID) REFERENCES Employee(EmployeeID),
FOREIGN KEY (DesiredShift) REFERENCES Shifts(ShiftTime)
);
SqlFiddleDemo
There always be the error:"Cannot add foreign key constraint" when I create my last table.
System: Mac OS X 10.9
DB : MySQL 5.6.14
DBM : Sequel Pro
CREATE TABLE users (
uid INT AUTO_INCREMENT PRIMARY KEY,
uname VARCHAR(20) NOT NULL,
uemail VARCHAR(20) NOT NULL,
ucity VARCHAR(20),
upassw VARCHAR(20) NOT NULL
);
CREATE TABLE songs(
sid INT AUTO_INCREMENT PRIMARY KEY,
sname VARCHAR(20) NOT NULL,
srldate DATE NOT NULL
);
CREATE TABLE albums (
albid INT AUTO_INCREMENT PRIMARY KEY,
albname VARCHAR(20) NOT NULL,
albrldate DATE NOT NULL,
albrltime TIME NOT NULL
);
CREATE TABLE artists (
aid INT AUTO_INCREMENT PRIMARY KEY,
aname VARCHAR(20) NOT NULL
);
CREATE TABLE genres (
gid INT AUTO_INCREMENT PRIMARY KEY,
gname VARCHAR(20) NOT NULL
);
CREATE TABLE playlists (
uid INT NOT NULL,
sid INT NOT NULL,
plname VARCHAR(20) NOT NULL,
plmdate DATE NOT NULL,
plmtime TIME NOT NULL,
PRIMARY KEY(uid, sid, plname, plmdate, plmtime),
FOREIGN KEY(uid) REFERENCES users(uid),
FOREIGN KEY(sid) REFERENCES songs(sid)
);
CREATE TABLE u_like_a (
aid INT NOT NULL,
uid INT NOT NULL,
PRIMARY KEY(aid, uid),
FOREIGN KEY(aid) REFERENCES artists(aid),
FOREIGN KEY(uid) REFERENCES users(uid)
);
CREATE TABLE be_fan (
aid INT NOT NULL,
uid INT NOT NULL,
PRIMARY KEY(aid, uid),
FOREIGN KEY(aid) REFERENCES artists(aid),
FOREIGN KEY(uid) REFERENCES users(uid)
);
CREATE TABLE follow (
uid INT NOT NULL,
to_uid INT NOT NULL,
PRIMARY KEY(uid, to_uid),
FOREIGN KEY(uid) REFERENCES users(uid),
FOREIGN KEY(to_uid) REFERENCES users(uid)
);
CREATE TABLE u_like_g (
gid INT NOT NULL,
uid INT NOT NULL,
PRIMARY KEY(gid, uid),
FOREIGN KEY(gid) REFERENCES genres(gid),
FOREIGN KEY(uid) REFERENCES users(uid)
);
CREATE TABLE u_share_pl(
uid INT NOT NULL,
from_uid INT NOT NULL,
plname VARCHAR(20) NOT NULL,
plmdate DATE NOT NULL,
plmtime TIME NOT NULL,
PRIMARY KEY(uid, from_uid, plname, plmdate, plmtime),
FOREIGN KEY(uid) REFERENCES users(uid),
FOREIGN KEY(from_uid) REFERENCES users(uid),
FOREIGN KEY(plname) REFERENCES playlists(plname),
FOREIGN KEY(plmdate) REFERENCES playlists(plmdate),
FOREIGN KEY(plmtime) REFERENCES playlists(plmtime)
); #####---> This is the last table.
ERROR comes from here. I really don't why.
I have check the type for all attributes. The type and name of attributes have no problem.
But the mysql always say "Cannot add foreign key constraint"
Here is you reference wrong forgien REFERENCES users(from_uid) in last table.
FOREIGN KEY(from_uid) REFERENCES users(from_uid)
from_uid not belong to users
This should be
FOREIGN KEY(from_uid) REFERENCES users(uid)
your playLists table has primary key combination of four columns, so you should supply all these four columns as forieng key in u_share_pl table.
Another composite key as a reference should be a single constraint like
FOREIGN KEY(from_uid,sid,plname,plmdate,plmtime) REFERENCES playlists(uid,sid,plname,plmdate,plmtime)
Your last table Create should be:
CREATE TABLE u_share_pl(
uid INT NOT NULL,
from_uid INT NOT NULL,
sid INT NOT NULL,
plname VARCHAR(20) NOT NULL,
plmdate DATE NOT NULL,
plmtime TIME NOT NULL,
PRIMARY KEY(uid, from_uid, plname, plmdate, plmtime),
FOREIGN KEY(uid) REFERENCES users(uid),
FOREIGN KEY(from_uid,sid,plname,plmdate,plmtime) REFERENCES playlists(uid,sid,plname,plmdate,plmtime)
);
I am trying this query and despite several attempts, I am still getting a syntax error when I create Table Call. The other tables get created just fine.. I don't understand why
Code for Student
CREATE TABLE Student (
`student_id` int NOT NULL AUTO_INCREMENT,
`phone_number` varchar(50) NOT NULL,
`name` varchar(50) NOT NULL,
`school` varchar(50) NOT NULL,
`class` varchar(50) NOT NULL,
PRIMARY KEY (`student_id`)
)
Table Stories
CREATE TABLE Stories (
`story_id` int NOT NULL AUTO_INCREMENT,
`story_name` varchar(50) NOT NULL,
`number_questions` int NOT NULL,
`file_name` varchar(100) NOT NULL,
PRIMARY KEY (`story_id`)
)
Table Questions
CREATE TABLE Questions (
`question_id` int NOT NULL,
`story_id` int NOT NULL,
`file_name` varchar(100) NOT NULL,
`concept_tested` varchar(100) NOT NULL,
`difficuly` varchar(50) NOT NULL,
`number_options` int NOT NULL,
`correct_answer` int NOT NULL,
`call_number` int NOT NULL,
PRIMARY KEY (`question_id`,`story_id`),
FOREIGN KEY (`story_id`)
REFERENCES `Stories`(`story_id`)
ON DELETE CASCADE
)
Table Call
CREATE TABLE Call (
`call_id` int NOT NULL AUTO_INCREMENT,
`student_id` int NOT NULL,
`story_id` int NOT NULL,
`question_id` int NOT NULL,
`call_number` int NOT NULL,
`total_number` int NOT NULL,
PRIMARY KEY (`call_id`),
FOREIGN KEY (`student_id`)
REFERENCES `Student`(`story_id`)
ON DELETE CASCADE,
FOREIGN KEY (`story_id`)
REFERENCES `Stories`(`student_id`)
ON DELETE CASCADE,
FOREIGN KEY (`question_id`)
REFERENCES `Stories`(`question_id`)
ON DELETE CASCADE
)
Here is my error:
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Call ( `call_id` int NOT NULL AUTO_INCREMENT, `student_id` int NOT NULL, ' at line 1
I have tried editing my code and checking it several times but the problem remains unsolved
I solved the problem,
It is:
CREATE TABLE `Call` (
`call_id` int NOT NULL AUTO_INCREMENT,
`student_id` int NOT NULL,
`story_id` int NOT NULL,
`question_id` int NOT NULL,
`call_number` int NOT NULL,
`total_number` int NOT NULL,
PRIMARY KEY (`call_id`),
FOREIGN KEY (`student_id`)
REFERENCES `Student`(`student_id`)
ON DELETE CASCADE,
FOREIGN KEY (`story_id`)
REFERENCES `Stories`(`story_id`)
ON DELETE CASCADE,
FOREIGN KEY (`question_id`)
REFERENCES `Questions`(`question_id`)
ON DELETE CASCADE
)
I found that these conditions must be satisfied to not get error 150:
The two tables must be ENGINE=InnoDB. (can be others: ENGINE=MyISAM works too)
The two tables must have the same charset.
The PK column(s) in the parent table and the FK column(s) must be the same data type.
The PK column(s) in the parent table and the FK column(s), if they have a define collation type, must have the same collation type;
If there is data already in the foreign key table, the FK column value(s) must match values in the parent table PK columns.
And the child table cannot be a temporary table.
Hope this helps.
Try like this
CREATE TABLE Questions (
`call_id` int NOT NULL AUTO_INCREMENT,
`student_id` int NOT NULL,
`story_id` int NOT NULL,
`question_id` int NOT NULL,
`call_number` int NOT NULL,
`total_number` int NOT NULL,
PRIMARY KEY (`call_id`),
FOREIGN KEY (`student_id`)
REFERENCES `Student`(`story_id`)
ON DELETE CASCADE,
FOREIGN KEY (`story_id`)
REFERENCES `Stories`(`student_id`)
ON DELETE CASCADE,
FOREIGN KEY (`question_id`)
REFERENCES `Stories`(`question_id`)
ON DELETE CASCADE
)ENGINE=MYISAM CHARACTER SET UTF8;
FIDDLE DEMO
Take a look at here