CREATE TABLE Countries
(CountryID INT NOT NULL PRIMARY KEY,
CountryName VARCHAR2(100) NOT NULL,
RegionID INT FOREIGN KEY REFERENCES Regions(RegionID)
);
keeps throwing me this:
ORA-00907: missing right parenthesis
What did I do wrong?
The inline foreign key syntax does not take a FOREIGN KEY keyword.
Consider:
CREATE TABLE Countries (
CountryID INT NOT NULL PRIMARY KEY,
CountryName VARCHAR2(100) NOT NULL,
RegionID INT REFERENCES Regions(RegionID)
);
Alternatively, you can declare the foreign key on another line, like so:
CREATE TABLE Countries (
CountryID INT NOT NULL PRIMARY KEY,
CountryName VARCHAR2(100) NOT NULL,
RegionID INT,
CONSTRAINT fkRegionID FOREIGN KEY (RegionID) REFERENCES Regions(RegionID)
);
This works as well:
CREATE TABLE Countries (
CountryID INT NOT NULL PRIMARY KEY,
CountryName VARCHAR2(100) NOT NULL,
RegionID INT,
FOREIGN KEY (RegionID) REFERENCES Regions(RegionID)
);
Demo on DB Fiddle
Related
I am trying to create SQL statements for an assignment in SQL Fiddle and I keep getting the error "Cannot add foreign key constraint". I have tried various things but I recieve different errors when I change things. What am I doing wrong?
CREATE TABLE Person (
ID int NOT NULL,
FName varchar(255),
LName varchar(255),
Preferred_Name varchar(255),
PRIMARY KEY (ID)
)
;
CREATE TABLE Song (
ID varchar(255) NOT NULL,
Title varchar(255),
Run_Time varchar(255),
Lyrics varchar(255),
LeadID int,
FOREIGN KEY (LeadID) REFERENCES Person(ID),
PRIMARY KEY (ID)
)
;
CREATE TABLE Album (
Title varchar(255) NOT NULL,
Run_Time int,
Release_Year TIMESTAMP,
PRIMARY KEY (Title)
)
;
CREATE TABLE Has (
Album_Title varchar(255),
Song_Title varchar(255),
FOREIGN KEY (Album_Title) REFERENCES Album(Title),
FOREIGN KEY (Song_Title) REFERENCES Song(ID)
)
;
CREATE TABLE Part_Of (
PersonID int,
SongID int,
Role varchar(255) NOT NULL,
FOREIGN KEY (PersonID) REFERENCES Person(ID),
FOREIGN KEY (SongID) REFERENCES Song(ID),
PRIMARY KEY (Role)
)
;
In the Song and Has tables you defined Song.ID and Has.Song_Title as a varchar(255). In the Part_Of table you defined SongID as an int. This is why the foreign key is failing. Use the same datatype in all tables (INT seems like a good option) to fix this.
CREATE TABLE Song (
ID varchar(255) NOT NULL, <------
Title varchar(255),
Run_Time varchar(255),
Lyrics varchar(255),
LeadID int,
FOREIGN KEY (LeadID) REFERENCES Person(ID),
PRIMARY KEY (ID)
)
;
CREATE TABLE Has (
Album_Title varchar(255),
Song_Title varchar(255), <-----
FOREIGN KEY (Album_Title) REFERENCES Album(Title),
FOREIGN KEY (Song_Title) REFERENCES Song(ID)
)
;
CREATE TABLE Part_Of (
PersonID int,
SongID int, <-----
Role varchar(255) NOT NULL,
FOREIGN KEY (PersonID) REFERENCES Person(ID),
FOREIGN KEY (SongID) REFERENCES Song(ID),
PRIMARY KEY (Role)
)
;
create database my_data
create table tblperson(
pid int primary key,
pname varchar(15),
pgender varchar(15)
)
create table tblgender(
gid varchar(15) primary key,
gender varchar(15)
)
Alter table tblperson add constraint giFK
Foreign key (pgender) references tblgender(gid)
Please help me, how can i get a list of users of the department with a filter by position?
CREATE TABLE COMPANY
(
ID INT GENERATED BY DEFAULT AS IDENTITY,
NAME VARCHAR(255),
PRIMARY KEY (ID),
UNIQUE KEY COMPANY_NAME (NAME)
);
CREATE TABLE USER
(
ID INT GENERATED BY DEFAULT AS IDENTITY,
NAME VARCHAR(255),
LASTNAME VARCHAR(255),
DATE_OF_BIRTH DATE ,
PRIMARY KEY (ID),
);
CREATE TABLE POSITION
(
ID INT NOT NULL GENERATED BY DEFAULT AS IDENTITY,
POSITION VARCHAR (50),
USERID INT NOT NULL,
PRIMARY KEY (ID),
FOREIGN KEY (USERID) REFERENCES USER(ID)
);
CREATE TABLE DEPARTMENT
(
ID INT GENERATED BY DEFAULT AS IDENTITY,
USER_ID INT NOT NULL,
COMPANY_ID INT NOT NULL,
DEPARTMENT_CATEGORY VARCHAR(50),
PRIMARY KEY (ID),
FOREIGN KEY (USER_ID) REFERENCES USER(ID),
FOREIGN KEY (COMPANY_ID) REFERENCES COMPANY(ID)
);
CREATE TABLE CATEGORY
(
ID INT NOT NULL GENERATED BY DEFAULT AS IDENTITY,
NAME VARCHAR (50),
PRIMARY KEY (ID)
);
CREATE TABLE DEPARTMENT_CATEGORY
(
DEPARTMENT_ID INT NOT NULL,
CATEGORY_ID INT NOT NULL,
FOREIGN KEY (DEPARTMENT_ID) REFERENCES DEPARTMENT(ID),
FOREIGN KEY (CATEGORY_ID) REFERENCES CATEGORY(ID)
);
Please help me!!
it look like you wanted to display results from department and position table that has both the data you need, but be specific about your filter (position) as u need to provide it in your where clause
select user_ID, department
from department as a
join user as b
on a. user_id = b. user_id
where position = 'put the specific position you wanted to be filtered here'
but your two userID columns are written differently as (User_id or USERID) correct that too not get failure result when you execute the task
I am getting an error when i create my tabels.
The problem is that AssCode is not unique, so i can set it to unique, the combination of courseCode and AssCode is unique, thats why they are set as primary keys. I am using postgressql
here is the error:
ERROR: there is no unique constraint matching given keys for referenced table "assignments"
SQL state: 42830
here is my code:
CREATE TABLE Teachers (
BSN int primary key,
Surname varchar(40) NOT NULL,
Name varchar(40) NOT NULL
);
CREATE TABLE Courses (
CourseCode varchar(10) primary key,
Name varchar(20) NOT NULL
);
CREATE TABLE Assignments (
CourseCode varchar(10) REFERENCES Courses ON DELETE CASCADE,
AssCode varchar(10),
primary key(CourseCode,AssCode),
DependOn varchar(10),
Year date,
week int
);
CREATE TABLE WorkOn (
BSN int REFERENCES Teachers(BSN),
CourseCode varchar(10) REFERENCES Assignments(CourseCode),
AssCode varchar(10) REFERENCES Assignments(AssCode),
primary key (CourseCode,BSN,AssCode)
);
I found the answer:
CREATE TABLE WorkOn (
BSN int primary key REFERENCES Teachers(BSN),
CourseCode varchar(10),
AssCode varchar(10),
foreign key (CourseCode, AssCode) references Assignments (CourseCode, AssCode)
);
This question already has an answer here:
ORA-00907: missing right parenthesis
(1 answer)
Closed 8 years ago.
I tried to create Foreign key and PRIMARY KEY
My code is ok with Table1
CREATE TABLE Persons
(
P_Id int NOT NULL PRIMARY KEY,
LastName varchar(255) NOT NULL,
FirstName varchar(255),
Address varchar(255),
City varchar(255)
);
Table2:
CREATE TABLE Orders
(
O_Id int NOT NULL PRIMARY KEY,
OrderNo int(10),
P_Id int FOREIGN KEY REFERENCES Persons(P_Id)
);
error :-ORA-00907: missing right parenthesis
Don't know what the error is.
When you declare the FK "inline" you must not specify the foreign key keyword:
CREATE TABLE Orders
(
O_Id int NOT NULL PRIMARY KEY,
OrderNo int(10),
P_Id int REFERENCES Persons(P_Id)
);
Btw: you don't even need to list the column name when using an inline definition, P_Id int REFERENCES Persons would be enough.
That will generate a system-named constraint (e.g. SYS_C0066866), so it's generally better to use a format where you can specify the name of the constraint:
CREATE TABLE Orders
(
O_Id int NOT NULL PRIMARY KEY,
OrderNo int(10),
P_Id int,
constraint fk_orders_person foreign key (p_id) REFERENCES Persons(P_Id)
);
If you're inlining your foreign key definition in the column's definition, you don't need the foreign key phrase:
CREATE TABLE Orders
(
O_Id int NOT NULL PRIMARY KEY,
OrderNo int(10),
P_Id int REFERENCES Persons(P_Id)
);
For MySql
CREATE TABLE Orders
(
O_Id int NOT NULL PRIMARY KEY,
OrderNo int(10),
P_Id int,
FOREIGN KEY(P_Id) REFERENCES Persons(P_Id)
);
For SQL
CREATE TABLE Orders
(
O_Id int NOT NULL PRIMARY KEY,
OrderNo int(10),
P_Id int FOREIGN KEY REFERENCES Persons(P_Id)
);
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