Foreign key error message in my SQL queries - sql

CREATE TABLE Parent
(
pID int IDENTITY(1,1) PRIMARY KEY,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
Email varchar(50) NOT NULL,
Address varchar(50) NOT NULL,
PersonalNumber int NOT NULL,
Phone varchar(50),
)
CREATE TABLE Student
(
sID int IDENTITY(1,1) PRIMARY KEY,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
Email varchar(50) NOT NULL,
Address varchar(50) NOT NULL,
PersonalNumber int NOT NULL,
Phone varchar(50),
-- causes error message
FOREIGN KEY (pID) REFERENCES Parent(pID),
);
I get the error message:
Foreign key references invalid table
How do I solve this?
Thanks.


You missed the pID column in student table. Try this:
CREATE TABLE Parent (
pID int IDENTITY(1,1) PRIMARY KEY,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
Email varchar(50) NOT NULL,
Address varchar(50) NOT NULL,
PersonalNumber int NOT NULL,
Phone varchar(50)
);
CREATE TABLE Student(
sID int IDENTITY(1,1) PRIMARY KEY,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
Email varchar(50) NOT NULL,
Address varchar(50) NOT NULL,
PersonalNumber int NOT NULL,
Phone varchar(50),
pID int,
FOREIGN KEY (pID) REFERENCES Parent(pID)
);

Related

Can a value be a primary and a foreign key?

I have the following tables in my SQL Server database.
Customer is a subtype of User thus I made a reference from Customer to User.
I also want to link my customer to my reservation. I'd like to use the Foreign key in the Customer table as a PK for this relation. When I write this out in SQL Server, I get this error under "(userid)":
Invalid column 'userid'
How can I make this relation?
Create table [dbo].[User]
(
[id] int PRIMARY KEY IDENTITY (1,1) NOT NULL,
[name] varchar(50) NOT NULL,
[password] nvarchar(100) NOT NULL,
)
Create table [dbo].[Customer]
(
[userid] int FOREIGN KEY REFERENCES [dbo].[User](id) NOT NULL,
[street] varchar(40) NOT NULL,
[housenumber] varchar(10) NOT NULL,
[postalcode] varchar(10) NOT NULL,
[phonenumber] varchar(20) NOT NULL,
[email] varchar(30) NOT NULL,
)
Create table [dbo].[Reservation]
(
[id] int PRIMARY KEY IDENTITY (1,1) NOT NULL,
[datum] date NOT NULL,
[prijs] decimal NOT NULL,
[levertijd] datetime NOT NULL,
[ophaaltijd] datetime NOT NULL,
[leverAdres] varchar(60) NOT NULL,
[klantId] int FOREIGN KEY REFERENCES [dbo].[Customer](userid) NOT NULL
)

yes this is possible, try it like this
Create table [dbo].[Customer]
(
[userid] int not null,
[street] varchar(40) NOT NULL,
[housenumber] varchar(10) NOT NULL,
[postalcode] varchar(10) NOT NULL,
[phonenumber] varchar(20) NOT NULL,
[email] varchar(30) NOT NULL,
constraint PK_UserID primary key ([userid]),
constraint FK_Customer_User foreign key (userid) references [User] (id)
)
But I have to say that userid seems like an odd primary key for a table called Customer
I would so something like this :
Create table [dbo].[Customer]
(
[CustomerID] int not null identity,
[userid] int not null,
[street] varchar(40) NOT NULL,
[housenumber] varchar(10) NOT NULL,
[postalcode] varchar(10) NOT NULL,
[phonenumber] varchar(20) NOT NULL,
[email] varchar(30) NOT NULL,
constraint PK_CustomerID primary key ([CustomerID]),
constraint FK_Customer_User foreign key (userid) references [User] (id)
)
Create table [dbo].[Reservation]
(
[id] int PRIMARY KEY IDENTITY (1,1) NOT NULL,
[datum] date NOT NULL,
[prijs] decimal NOT NULL,
[levertijd] datetime NOT NULL,
[ophaaltijd] datetime NOT NULL,
[leverAdres] varchar(60) NOT NULL,
[klantId] int FOREIGN KEY REFERENCES [dbo].[Customer](customerid) NOT NULL
)

i am trying to create tables but it show me 2 errors, how i fix it?

2 errors were found during analysis.
Unexpected beginning of statement. (near "admin_id" at position 349)
Unrecognized statement type. (near "INT" at position 358)
CREATE TABLE Users (
user_id INT NOT NULL AUTO_INCREMENT,
email VARCHAR(80) NOT NULL,
password CHAR(41) NOT NULL,
name VARCHAR(50) NOT NULL,
phone VARCHAR(20) NOT NULL,
gender VARCHAR(6) NOT NULL,
fbinfo VARCHAR(50) NOT NULL,
age INT NOT NULL,
PRIMARY KEY (user_id),
UNIQUE INDEX (email)
)
CREATE TABLE Admin (
admin_id INT NOT NULL AUTO_INCREMENT,
email VARCHAR(80) NOT NULL,
password CHAR(41) NOT NULL,
PRIMARY KEY (admin_id),
UNIQUE INDEX (email)
)
CREATE TABLE Task (
task_id INT NOT NULL AUTO_INCREMENT,
tex VARCHAR(140) NOT NULL,
datetime DATE,
status INT,
calendar BOOLEAN,
PRIMARY KEY (task_id),
lat DECIMAL(9,6),
long DECIMAL(9,6)
)

If you are doing this in one execution, you would need to include a ; at the end of each of your table creation statements.
CREATE TABLE Users (
user_id INT NOT NULL AUTO_INCREMENT,
email VARCHAR(80) NOT NULL,
password CHAR(41) NOT NULL,
name VARCHAR(50) NOT NULL,
phone VARCHAR(20) NOT NULL,
gender VARCHAR(6) NOT NULL,
fbinfo VARCHAR(50) NOT NULL,
age INT NOT NULL,
PRIMARY KEY (user_id),
UNIQUE INDEX (email)
);
CREATE TABLE Admin (
admin_id INT NOT NULL AUTO_INCREMENT,
email VARCHAR(80) NOT NULL,
password CHAR(41) NOT NULL,
PRIMARY KEY (admin_id),
UNIQUE INDEX (email)
);
CREATE TABLE Task (
task_id INT NOT NULL AUTO_INCREMENT,
tex VARCHAR(140) NOT NULL,
datetime DATE,
status INT,
calendar BOOLEAN,
PRIMARY KEY (task_id),
lat DECIMAL(9,6),
long DECIMAL(9,6)
);

Table creation derby sql jpa

Hi guys i am looking for a bit of help
i have got
create table usertable (
username varchar(128) NOT NULL CONSTRAINT USER_PK PRIMARY KEY ,
password varchar(128) NOT NULL
);
create table grouptable(
username varchar(128) NOT NULL,
groupid varchar(128) NOT NULL,
CONSTRAINT GROUP_PK PRIMARY KEY(username, groupid),
CONSTRAINT USER_FK FOREIGN KEY(username) REFERENCES usertable(username)
ON DELETE CASCADE ON UPDATE RESTRICT
);
to have a username and password to be stored into the database, what i am asking is how can i add another table called address and link it with the usertable in a many-to-one realtionship as one user could have several address, how do i go about doing this ?
Thanks guys !
EDIT
would this work ?
create table usertable (
username varchar(128) NOT NULL CONSTRAINT USER_PK PRIMARY KEY ,
password varchar(128) NOT NULL,
firstaname varchar(30) NOT NULL,
surname varchar(30) NOT NULL,
gender varchar(6) NOT NULL,
homenumber varchar(128) NOT NULL,
mobilenumber varchar(128) NOT NULL,
dob date NOT NULL,
id INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1)
);
create table grouptable(
username varchar(128) NOT NULL,
groupid varchar(128) NOT NULL,
CONSTRAINT GROUP_PK PRIMARY KEY(username, groupid),
CONSTRAINT USER_FK FOREIGN KEY(username) REFERENCES usertable(username)
ON DELETE CASCADE ON UPDATE RESTRICT
);
create table address(
username varchar(128) NOT NULL,
addressline1 varchar(128) NOT NULL,
addressline2 varchar(128) NOT NULL,
addressline3 varchar(128) NOT NULL,
country varchar(128) NOT NULL,
postcode varchar(9) NOT NULL,
CONSTRAINT USER2_FK FOREIGN KEY(username) REFERENCES usertable(username)
);
EDIT 2 :
create table usertable (
username varchar(128) NOT NULL CONSTRAINT USER_PK PRIMARY KEY,
password varchar(128) NOT NULL,
firstaname varchar(30) NOT NULL,
surname varchar(30) NOT NULL,
gender varchar(6) NOT NULL,
homenumber varchar(128) NOT NULL,
mobilenumber varchar(128) NOT NULL,
dob date NOT NULL,
id INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1)
);
create table grouptable(
username varchar(128) NOT NULL,
groupid varchar(128) NOT NULL,
CONSTRAINT GROUP_PK PRIMARY KEY(username, groupid),
CONSTRAINT USER_FK FOREIGN KEY(username) REFERENCES usertable(username)
ON DELETE CASCADE ON UPDATE RESTRICT
);
create table address(
ID NUMERIC(3) not null primary key,
username varchar(128) NOT NULL,
addressline1 varchar(128) NOT NULL,
addressline2 varchar(128) NOT NULL,
addressline3 varchar(128) NOT NULL,
country varchar(128) NOT NULL,
postcode varchar(9) NOT NULL,
CONSTRAINT USER2_FK FOREIGN KEY(username) REFERENCES usertable(username)
);

Microsoft SQL, foreign key not referencing table, can't see what's causing it

I've spent a while trying to firgure it but but I can't see anything that would be causing this error. I'm thinking maybe something to do with the "Unique" statement.
Msg 1767, Level 16, State 0, Line 40
Foreign key 'FK_Loan_ItemNo__0AD2A005' references invalid table
'Item'.
Here's the code if someone wants to use it to replicate problem:
CREATE DATABASE LibrarySystem10
GO
USE LibrarySystem10
GO
CREATE TABLE MemberType(
MemberTypeNo int NOT NULL,
Name varchar(50) NOT NULL,
Description varchar(250) NOT NULL,
MaxNumberLoans int NOT NULL,
MaxLoanDuration int NOT NULL
PRIMARY KEY (MemberTypeNo)
)
insert into MemberType values ('0','UnderGraduate','A student at a college or university who has not yet earned a bachelor''s or equivalent degree.','5','10')
insert into MemberType values ('1','PostGraduate','A student undertaking study after completing a first degree.','10','10')
insert into MemberType values ('2','Staff','Staff at the university','15','15')
CREATE TABLE Member(
MemberNo int NOT NULL,
MemberTypeNo int NOT NULL,
FirstName varchar(150) NOT NULL,
LastName varchar(150) NULL,
DateOfBirth varchar (200) NULL,
HouseNo int NOT NULL,
Street varchar(50) NOT NULL,
Suburb varchar(100) NOT NULL,
PostCode int NOT NULL,
EmailAddress varchar(250) NULL,
HomePhoneNo varchar(250) NULL,
MobileNo varchar(250) NULL,
MembershipStartDate varchar (200) NOT NULL,
MembershipEndDate varchar (200) NOT NULL,
MembershipStatus varchar(100) NOT NULL,
PinNo int NOT NULL
PRIMARY KEY (MemberNo)
FOREIGN KEY (MemberTypeNo)REFERENCES MemberType ON UPDATE CASCADE
)
insert into member values ('0','0','Shane','Lindsay','15-11-1992','90','fake st','FauxTon','2250','shane#hotmai.com','0243296356','0415657164','15-11-2010','15-11-2020','current','0105')
insert into member values ('1','0','Shaune','Lincoln','18-12-1992','92','faken st','FauxTone','2350','shaune27#hotmai.com','0243253357','041565757','14-12-2010','14-12-2020','deferred','0123')
insert into member values ('2','0','Sarah','richards','08-08-1990','45','Small st','Hornsby','2279','Sarah67#hotmai.com','02432567154','0416451845','01-01-2012','01-01-2022','current','0123')
CREATE TABLE Loan(
MemberNo int NOT NULL FOREIGN KEY(MemberNo) REFERENCES Member ON UPDATE CASCADE,
ItemNo int NOT NULL FOREIGN KEY(ItemNo) REFERENCES Item ON UPDATE CASCADE,
DateLoaned varchar (50) NOT NULL,
DueDate varchar (50) NOT NULL,
Status varchar(50) NOT NULL,
FinesImposed bit NOT NULL DEFAULT '0' CHECK (finesImposed IN ('0','1')) ,
Renewed bit NOT NULL DEFAULT '0' CHECK (Renewed IN ('0','1')),
UNIQUE(MemberNo,ItemNo,DateLoaned)
)
insert into Loan values ('0','0','10-10-2012','15-10-2012','loaned','0','0')
insert into Loan values ('1','0','12-10-2012','15-10-2012','loaned','0','1')
CREATE TABLE Item(
ItemNo int NOT NULL,
Title varchar(50) NOT NULL,
Subject varchar(100) NULL,
ISBN int NULL,
PhysicalDescription varchar(150) NULL,
Author varchar(75) NULL,
PRIMARY KEY (ItemNo)
)
insert into Item values ('0','Book1','IT','0501425252','Big,42pages','John Doe')
insert into Item values ('1','Book2','IT','0501425253','Big,42pages','John Doe')
CREATE TABLE ItemCopy(
ItemNo int NOT NULL,
CallNumber varchar(50) NOT NULL,
Condition varchar(50) NULL,
UNIQUE(ItemNo,CallNumber),
PRIMARY KEY (CallNumber)
)
insert into ItemCopy values ('0','0','good')
CREATE TABLE Hold(
HoldNo int NOT NULL,
MemberNo int NOT NULL FOREIGN KEY(MemberNo) REFERENCES Member ON UPDATE CASCADE,
ItemNo int NOT NULL FOREIGN KEY(ItemNo) REFERENCES Item ON UPDATE CASCADE,
DateTimeHeld datetime NOT NULL,
comments varchar(200) NULL,
Status varchar(50) NOT NULL
PRIMARY KEY (HoldNo)
)
CREATE TABLE Fine(
FineNo int NOT NULL,
MemberNo int NOT NULL FOREIGN KEY(MemberNo) REFERENCES Member ON UPDATE CASCADE,
Description varchar(50) NULL,
Amount int NOT NULL,
PRIMARY KEY (FineNo)
)
CREATE TABLE AudioRecording(
Length varchar(50) NULL,
BitRate varchar(50) NULL,
Size varchar(50) NULL
)
CREATE TABLE ItemCollection(
ItemNo int NULL,
CollectionName varchar(75) NULL
UNIQUE (ItemNo,CollectionName)
)
CREATE TABLE Collection(
CollectionName varchar(75)NOT NULL
PRIMARY KEY (CollectionName)
)
CREATE TABLE Book(
PublisherInfo varchar(150) NULL,
Edition int NULL,
Notes varchar(250) NULL,
Status varchar(50) NULL
)
CREATE TABLE Journal(
Series int NULL,
Notes varchar(250) NULL,
OtherTitles varchar(150) NULL,
PriorTitles varchar(250) NULL
)
SELECT m.FirstName, l.Status, l.DueDate
FROM Member m, Loan l
WHERE m.MemberNo = '0' AND l.MemberNo = m.MemberNo

Loan references Item, but you create Loan before you create Item. Create the Item table first.

SQL table creation code gives error

could someone have a look at this for me, I can't seem to find why it is not working.
CREATE TABLE Person(
Person_ID int auto_increment NOT NULL,
Person_Type_ID int NOT NULL,
Create_Date datetime NOT NULL ,
Modify_Date datetime NOT NULL ,
First_Name varchar(50) NOT NULL,
Surname varchar(50) NOT NULL,
DOB date NOT NULL,
Gender char(1) NOT NULL CHECK (Gender ='f' OR Gender ='m'),
Archive char(1) NULL,
Allergies varchar(200) NOT NULL,
Dietry_Requirements varchar(200) NOT NULL,
Disabilities varchar(200) NOT NULL,
Medicine_Requirements varchar(200) NOT NULL,
username varchar (30) NOT NULL,
password varchar (30) NOT NULL,
CONSTRAINT PK_Person_ID PRIMARY KEY (Person_ID)
CONSTRAINT FK_Person_Type_ID FOREIGN KEY (Person_Type_ID)
REFERENCES Person_Type (Person_Type_ID));

You missed a comma! This should work...
CREATE TABLE Person(
Person_ID int auto_increment NOT NULL,
Person_Type_ID int NOT NULL,
Create_Date datetime NOT NULL ,
Modify_Date datetime NOT NULL ,
First_Name varchar(50) NOT NULL,
Surname varchar(50) NOT NULL,
DOB date NOT NULL,
Gender char(1) NOT NULL CHECK (Gender ='f' OR Gender ='m'),
Archive char(1) NULL,
Allergies varchar(200) NOT NULL,
Dietry_Requirements varchar(200) NOT NULL,
Disabilities varchar(200) NOT NULL,
Medicine_Requirements varchar(200) NOT NULL,
username varchar (30) NOT NULL,
password varchar (30) NOT NULL,
CONSTRAINT PK_Person_ID PRIMARY KEY (Person_ID),
CONSTRAINT FK_Person_Type_ID FOREIGN KEY (Person_Type_ID)
REFERENCES Person_Type (Person_Type_ID));