i have this script running on sql, but i need to optimize it to mysql using the workbench, but it shows me an error in the foreign key and i don't know how to change it.
create table EspecialidadesMedicas(
IdEspecialidad int(4) primary key,
DescripcionEspecialidad varchar(30));
create table Doctores(
IdDoctor int(5) PRIMARY KEY,
NombreDoctor varchar(30),
Salario int(12.2),
Especialidad int(4),citascitas
Especialidad FOREIGN KEY references EspecialidadesMedicas(IdEspecialidad));
The following is working syntax:
create table EspecialidadesMedicas (
IdEspecialidad int(4) primary key,
DescripcionEspecialidad varchar(30)
);
create table Doctores(
IdDoctor int(5) PRIMARY KEY,
NombreDoctor varchar(30),
Salario int(12),
Especialidad int(4),
citascitas varchar(30),
constraint fk_Especialidad FOREIGN KEY (Especialidad) references EspecialidadesMedicas(IdEspecialidad)
);
Related
I am new to mysql, so sorry if this is a trivial problem. Problem is when I create the second table I get the error:
key iplogger_redirect_key doesn't exist.
Here's my code:
DROP DATABASE iploggerdb;
CREATE DATABASE iploggerdb;
USE iploggerdb;
CREATE TABLE iplogger_info_table(
iplogger_redirect_key CHAR(8) PRIMARY KEY,
access_key CHAR(8) NOT NULL,
creation_timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
creator_ip VARCHAR(45),
original_url VARCHAR(2000)
);
CREATE TABLE logs_table(
id INT(11) AUTO_INCREMENT,
iplogger_redirect_key FOREIGN KEY (iplogger_redirect_key) REFERENCES iplogger_info_table(iplogger_redirect_key),
logged_ip VARCHAR(45),
logged_dns_server VARCHAR(45),
logged_ip_country_city VARCHAR(200),
logged_hostname VARCHAR(200),
logged_user_agent VARCHAR(150),
logged_referrer VARCHAR(2000),
logged_ip_timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
You need to correct FOREIGN KEY part:
CREATE TABLE logs_table(
id INT(11) AUTO_INCREMENT PRIMARY KEY,
iplogger_redirect_key CHAR(8),
CONSTRAINT fk_name FOREIGN KEY (iplogger_redirect_key)
REFERENCES iplogger_info_table(iplogger_redirect_key),
...
)
DBFiddle Demo
I'm getting an ERROR 1064 (42000) at line 21, which is VIN_Number in Vehicle table. Entity Inventory gets built without a problem, VIN_Number is of type varchar(17) for all occurrences. I believe the tables are being built in the correct order. I can't find any spelling or punctuation errors. I'm out of ideas of things I should checked. What is it that I'm missing?
Note: I getting an error for Invoice as well, but I know that it can't be created until Vehicle gets created.
ALTER TABLE Vehicle DROP FOREIGN KEY fk_Veh_Vehicle_TypeID;
ALTER TABLE Inventory DROP FOREIGN KEY fk_Inv_Vehicle_TypeID;
ALTER TABLE Invoice DROP FOREIGN KEY fk_Customer_ID;
ALTER TABLE Invoice DROP FOREIGN KEY fk_Sales_Person_ID;
ALTER TABLE Invoice DROP FOREIGN KEY fk_VIN_Number;
DROP TABLE IF EXISTS Vehicle, VehicleType,
Invoice, Customer, SalesPerson, Inventory;
CREATE TABLE VehicleType (
Vehicle_TypeID int NOT NULL,
Veh_Make varchar(15),
Veh_Model varchar(15),
Veh_Year int,
PRIMARY KEY (Vehicle_TypeID)
) Engine=InnoDB;
CREATE TABLE Vehicle (
VIN_Number varchar(17) NOT NULL,
Vehicle_TypeID int NOT NULL,
Condition varchar(10),
Color varchar(8),
PRIMARY KEY (VIN_Number),
CONSTRAINT fk_Veh_Vehicle_TypeID FOREIGN KEY(Vehicle_TypeID)
REFERENCES VehicleType(Vehicle_TypeID)
) Engine=InnoDB;
CREATE TABLE Inventory (
Stock_ID int NOT NULL,
Vehicle_TypeID int NOT NULL,
Quantity int,
PRIMARY KEY (Stock_ID),
CONSTRAINT fk_Inv_Vehicle_TypeID FOREIGN KEY (Vehicle_TypeID)
REFERENCES VehicleType(Vehicle_TypeID)
) Engine=InnoDB;
CREATE TABLE Customer (
Customer_ID varchar(10) NOT NULL,
Cus_LastName varchar(15),
Cus_FirstName varchar(15),
Cus_Street varchar(20),
Cus_City varchar(15),
Cus_Zip varchar(5),
Cus_Phone varchar(10),
PRIMARY KEY (Customer_ID)
) Engine=InnoDB;
CREATE TABLE SalesPerson (
Sales_Person_ID varchar(10) NOT NULL,
Sal_LastName varchar(15),
Sal_FirstName varchar(15),
Sal_Street varchar(15),
Sal_City varchar(15),
Sal_Zip varchar(5),
Sal_Phone varchar(10),
Sal_Years_Worked int,
Sal_Commission_Rate float(4),
PRIMARY KEY (Sales_Person_ID)
) Engine=InnoDB;
CREATE TABLE Invoice (
Invoice_ID varchar(10) NOT NULL,
Customer_ID varchar(10) NOT NULL,
Sales_Person_ID varchar(10) NOT NULL,
VIN_Number varchar(17) NOT NULL,
Price float(10),
PRIMARY KEY (Invoice_ID),
CONSTRAINT fk_Customer_ID FOREIGN KEY (Customer_ID)
REFERENCES Customer(Customer_ID),
CONSTRAINT fk_Sales_Person_ID FOREIGN KEY (Sales_Person_ID)
REFERENCES SalesPerson(Sales_Person_ID),
CONSTRAINT fk_VIN_Number FOREIGN KEY (VIN_Number)
REFERENCES Vehicle(VIN_Number)
) Engine=InnoDB;
In the definition of the Vehicle table you have a column named condition which is a reserved keyword in MySQL (reference). Either use another name for the column or enclose it in backticks like this: `condition`
Using keywords (reserved or not) for object names is generally something you want to avoid.
When I try to set a Foreign key, it throws the Error number 150.
Schema Creation Failed: Can't create table 'db_2_f856e.urlnames'
This is the code:
create table images(
id int auto_increment primary key
,gender varchar(6)
,pattern varchar(50)
,item_name varchar(25)
,url_id int(250)
)//
create table urlnames(
url_id_no int(250)
,url varchar(250)
,foreign key (url_id_no) references images(url_id)
)//
Can someone explain why it is not working?
Thanks
Your data structure doesn't make sense. I think you want:
create table urlnames(
url_id_no int auto_increment primary key,
url varchar(250)
);
create table images(
image_id int auto_increment primary key,
gender varchar(6),
pattern varchar(50),
item_name varchar(25),
url_id int(250) references urlnames(url_id_no)
);
Any column referenced by a foreign key reference needs to be a primary key or unique key. And, urlnames should have its id column declared as a primary key.
Here is a SQL Fiddle example.
I am trying to create a database that holds staff information such as their names, timesheets, holidays booked etc and also information about the projects the are carrying out and what companies the projects are for. My code is below:
CREATE TABLE IF NOT EXISTS tblcompany (
companyid INT(11) UNSIGNED NOT NULL,
custfirst VARCHAR(50),
custlast VARCHAR(50),
company VARCHAR(50),
custphone VARCHAR(50),
custemail VARCHAR(50),
PRIMARY KEY (companyid),
INDEX (companyid),
CONSTRAINT FOREIGN KEY (companyid)
REFERENCES tblproject (companyid)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS tblemployee (
employeeid INT(11) UNSIGNED NOT NULL,
employeefirst VARCHAR(50),
employeelast VARCHAR(50),
employeephone VARCHAR(50),
employeeemail VARCHAR(50),
PRIMARY KEY (employeeid),
INDEX (employeeid),
CONSTRAINT FOREIGN KEY (employeeid)
REFERENCES tbltimesheet (employeeid),
CONSTRAINT FOREIGN KEY (employeeid)
REFERENCES tblholiday (employeeid),
CONSTRAINT FOREIGN KEY (employeeid)
REFERENCES tblannualleave (employeeid)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS tblholiday (
holidayid INT(11) UNSIGNED NOT NULL,
employeeid INT(11) UNSIGNED NOT NULL,
holidayfrom DATE,
holidayto DATE,
holidayhalfday BOOLEAN,
holidayreason VARCHAR(50),
INDEX (employeeid),
PRIMARY KEY (holidayid)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS tblannualleave (
annualleaveid INT(11) UNSIGNED NOT NULL,
employeeid INT(11) UNSIGNED NOT NULL,
annualleavetaken INT(11),
annualleaveremain INT(11),
anuualleavetotal INT(11),
INDEX (employeeid),
PRIMARY KEY (annualleaveid)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS tblproject (
projectid INT(11) UNSIGNED NOT NULL,
projectname VARCHAR(50),
projecttype VARCHAR(50),
companyid INT(11) UNSIGNED NOT NULL,
projectnotes VARCHAR(50),
PRIMARY KEY (projectid),
INDEX (projectid),
CONSTRAINT FOREIGN KEY (projectid)
REFERENCES tbltimesheet (projectid)
) ENGINE=InnoDB;
CREATE TABLE IF NOT EXISTS tbltimesheet (
timesheetid INT(11) UNSIGNED NOT NULL,
employeeid INT(11) UNSIGNED NOT NULL,
projectid INT(11) UNSIGNED NOT NULL,
timesheetdate DATE,
timesheethours INT(11),
timesheetnotes VARCHAR(50),
INDEX (employeeid),
PRIMARY KEY (timesheetid)
) ENGINE=InnoDB;
I have been looking around and have tried everything, it is probably something so simple. I have changed all the datatypes to similar ones to see if this would solve the problem butno luck. The error code I get is:
Error Code: 1215. Cannot add foreign key constraint
0.063 sec
CREATE TABLE IF NOT EXISTS tblcompany ( companyid INT(11) UNSIGNED
NOT NULL, custfirst VARCHAR(50), custlast VARCHAR(50),
company VARCHAR(50), custphone VARCHAR(50), custemail
VARCHAR(50), PRIMARY KEY (companyid), INDEX (companyid),
CONSTRAINT FOREIGN KEY (companyid) REFERENCES tblproject
(companyid) ) ENGINE=InnoDB
11:15:57 CREATE TABLE IF NOT EXISTS tblcompany ( companyid INT(11)
UNSIGNED NOT NULL, custfirst VARCHAR(50), custlast
VARCHAR(50), company VARCHAR(50), custphone VARCHAR(50),
custemail VARCHAR(50), PRIMARY KEY (companyid), INDEX
(companyid), CONSTRAINT FOREIGN KEY (companyid) REFERENCES
tblproject (companyid) ) ENGINE=InnoDB Error Code: 1215. Cannot add
foreign key constraint 0.063 sec
Thank you for looking..
Create the table tblproject first before you reference it.
Besides the wrong table order,you need either a primary or unique key on referenced columns.
SQL fiddle
I think you will solve your problem creating your tables in the opposite ordersm, otherwise you will have the same issue with tblemployee.
A Foreigh Key needs that the reference table exists already.
You cannot create a foreign key when the table it references does not yet exist. You can always create the foreign key later.
You must first create the tables containing the referenced fields, after you create the table with the foreign key.
You could also create first all the tables, and create all foreign keys in a second step.
I am creating several tables at once and I keep getting the error(150):
#1005 - Can't create table 'waget.tour' (errno: 150)
and despite me knowing what the error is, I simply can't fix it. All tables references in the table "tour" are all there and exist, with keys where Foreign keys are referenced. I've checked it over plenty of times, and simply can't find anything. Can anyone see what I am doing wrong?
(Getting error when creating the table "tours")
CREATE TABLE IF NOT EXISTS tourPayment(
tourPaymentNumber int,
tourCost int(7),
PRIMARY KEY (tourPaymentNumber),
KEY (tourCost)
);
CREATE TABLE IF NOT EXISTS hotel(
hotelID int AUTO_INCREMENT,
hotelName varchar(30),
PRIMARY KEY (hotelID),
KEY (hotelName)
);
CREATE TABLE IF NOT EXISTS salutation(
salutationID int AUTO_INCREMENT,
salutation varchar(4),
KEY (salutation)
);
CREATE TABLE IF NOT EXISTS customer(
custID int AUTO_INCREMENT,
custSalutation varchar(4),
custLname varchar(30),
custAdd varchar(100),
custPcode varchar(4),
custState varChar(20),
custPhone varchar(10),
custHotel varchar(30),
PRIMARY KEY (custID),
FOREIGN KEY (custHotel) REFERENCES hotel(hotelName),
FOREIGN KEY (custSalutation) REFERENCES salutation(salutation)
);
CREATE TABLE IF NOT EXISTS bus(
busID int AUTO_INCREMENT,
busMake varchar(30),
busSeats varchar(3),
PRIMARY KEY (busID)
);
CREATE TABLE IF NOT EXISTS busDriver(
driverID int AUTO_INCREMENT,
driverName varchar(20),
driverEmail varchar(40),
busID int,
PRIMARY KEY (driverID),
FOREIGN KEY (busID) REFERENCES bus(busID)
);
CREATE TABLE IF NOT EXISTS tour(
DailyTourID int AUTO_INCREMENT,
NoOfPeople int(3),
tourDate DATE,
tourTime TIME,
tourName varchar(30),
tourCost int(7),
tourDriverID varchar(20),
PRIMARY KEY (DailyTourID),
FOREIGN KEY (tourDriverID) REFERENCES busDriver(driverID),
FOREIGN KEY (tourCost) REFERENCES tourPayment(tourCost)
);
CREATE TABLE IF NOT EXISTS TourCustLink(
TourCustLinkID int AUTO_INCREMENT,
TourID int,
custID int,
PRIMARY KEY (TourCustLinkID),
FOREIGN KEY (TourID) REFERENCES tour(DailyTourID),
FOREIGN KEY (custID) REFERENCES customer(custID)
);
Here is your problem:
FOREIGN KEY (tourDriverID) REFERENCES busDriver(driverID)
references an INT but is declared as varchar(20)
AUTO_INCREMENT fields all need to be PRIMARY KEY's, so try changing salutation to be
CREATE TABLE IF NOT EXISTS salutation(
salutationID int AUTO_INCREMENT,
salutation varchar(4),
PRIMARY KEY (salutationID),
KEY (salutation)
);
Additionally in tour you have the wrong datatype for tourDriverID, it should be INT to match the referenced key
CREATE TABLE IF NOT EXISTS tour(
DailyTourID int AUTO_INCREMENT,
NoOfPeople int(3),
tourDate DATE,
tourTime TIME,
tourName varchar(30),
tourCost int(7),
tourDriverID INT,
PRIMARY KEY (DailyTourID),
FOREIGN KEY (tourDriverID) REFERENCES busDriver(driverID),
FOREIGN KEY (tourCost) REFERENCES tourPayment(tourCost)
);
SQL fiddle example in full can be found here : http://sqlfiddle.com/#!2/840b9
Actually it's easy to try and create tables one by one and you would get a better error message..
Your Problem is the table salutation since you have to define the AUTO_INCREMENT field (in your case salutationID) as KEY and not the fieldsalutation`
CREATE TABLE IF NOT EXISTS salutation(
salutationID int AUTO_INCREMENT,
salutation varchar(4),
KEY (salutationID) -- here is your error
);
Is this the code you ran? if so, the error is about the AUTO_INCREMENT needing to be a Key.
CREATE TABLE IF NOT EXISTS salutation(
salutationID int AUTO_INCREMENT,
salutation varchar(4),
KEY (salutation)
);
Try:
CREATE TABLE IF NOT EXISTS salutation(
salutationID int AUTO_INCREMENT,
salutation varchar(4),
KEY (salutationID)
);
and make other a FOREIGN KEY if you need to.
Cheers.