Here are my two tables I created.
CREATE TABLE Employee
(
EmpID int IDENTITY(1,1) PRIMARY KEY,
LastName VARCHAR(50) NOT NULL,
FirstName VARCHAR(50) NOT NULL,
StreetAddress VARCHAR(75),
City VARCHAR(255),
State VARCHAR(25),
ZipCode VARCHAR(5),
EmployeeType VARCHAR (20),
HourlyWage DECIMAL(18,2)
)
CREATE TABLE WagesPayable
(
FOREIGN KEY (EmpID) REFERENCES Employee (EmpID),
WorkedHours DECIMAL(18,2),
PayRate DECIMAL(18,2),
TotalPayable AS (WorkedHours * PayRate),
DateLastPaid DATETIME
)
Whenever I try and create the WagesPayable table I get the following error:
Msg 1769, Level 16, State 1, Line 26
Foreign key 'EmpID' references invalid column 'EmpID' in referencing table 'WagesPayable'.
What am I missing here? Your help is much appreciated.
You need to declare the column before the reference. You can do this all in one step:
CREATE TABLE WagesPayable
(
EmpID int REFERENCES Employee (EmpID),
WorkedHours DECIMAL(18,2),
PayRate DECIMAL(18,2),
TotalPayable AS (WorkedHours * PayRate),
DateLastPaid DATETIME
)
The SQL Fiddle is here.
You aren't creating a column EmpID for table WagesPayable.
So first you need to create the column, and then reference it as a foreign key like this :
CREATE TABLE WagesPayable
(
EmpID int,
WorkedHours DECIMAL(18,2),
PayRate DECIMAL(18,2),
TotalPayable AS (WorkedHours * PayRate),
DateLastPaid DATETIME,
FOREIGN KEY (EmpID) REFERENCES Employee (EmpID)
)
Related
This is the code that created the table.
CREATE TABLE CUSTOMERS
(
Customer_ID INT NOT NULL,
CHECK(Customer_ID <= 11),
First_Name varchar(20) NOT NULL,
Last_Name varchar(30),
Home_Street varchar(30),
Home_City varchar(20),
Home_State varchar(2),
Home_Zip varchar(5),
PhoneNumber varchar(11) NOT NULL
);
ALTER TABLE CUSTOMERS
ADD CONSTRAINT PK_CUSTOMERS PRIMARY KEY(Customer_ID);
Then I try to insert data (using this code) into the table and that is where I get this error.
INSERT INTO dbo.CUSTOMERS(Customer_ID, First_Name, Last_Name, Home_Street, Home_City, Home_State, Home_Zip, PhoneNumber)
VALUES (11223344556, 'John', 'Doe', '1234 Hand Street', 'Wahiawa', 'HI', 96786, 2535551267);
What am I doing wrong and what can I do to fix this issue?
AS per my understanding you are checking length of Customer_ID <=11 so you should mention len(Customer_ID)<=11 it will work and you should alter datatype of Customer_ID int to bigint
CREATE TABLE CUSTOMERS
(
Customer_ID bigINT NOT NULL,
CHECK(len(Customer_ID)<=11),
First_Name varchar(20) NOT NULL,
Last_Name varchar(30),
Home_Street varchar(30),
Home_City varchar(20),
Home_State varchar(2),
Home_Zip varchar(5),
PhoneNumber varchar(11) NOT NULL
);
ALTER TABLE CUSTOMERS
ADD CONSTRAINT PK_CUSTOMERS
PRIMARY KEY(Customer_ID);
INSERT INTO dbo.CUSTOMERS(Customer_ID,First_Name,Last_Name,Home_Street,
Home_City,Home_State,Home_Zip,PhoneNumber)
VALUES(11223344556,'John','Doe','1234 Hand Street',
'Wahiawa','HI',96786,2535551267);
You need customer id to be bigint:
CREATE TABLE CUSTOMERS
(
Customer_ID BIGINT NOT NULL,
CHECK(Customer_ID<=11),
First_Name varchar(20) NOT NULL,
Last_Name varchar(30),
Home_Street varchar(30),
Home_City varchar(20),
Home_State varchar(2),
Home_Zip varchar(5),
PhoneNumber varchar(11) NOT NULL
);
ALTER TABLE CUSTOMERS
ADD CONSTRAINT PK_CUSTOMERS
PRIMARY KEY(Customer_ID);
The problem may be due to CHECK(Customer_ID<=11) since Customer_ID id integer datatype the server may check for integer validation and not length validation. Try to change the validation.
this is my code
CREATE TABLE orders(
id integer NOT NULL,
name varchar(12),
orderno int,
city varchar(12),
price int
PRIMARY KEY ('id')
);
please check this image for error
try this
CREATE TABLE orders(
id int NOT NULL PRIMARY KEY,
name varchar(12),
orderno int,
city varchar(12),
price int
);
While Creating Table you can Declare the primary key Attribute with the type of the attribute. like.
CREATE TABLE orders(
id integer PRIMARY KEY NOT NULL,
name varchar(12),
orderno int,
city varchar(12),
price int);
How do I look at one table and use it to check another table for data integrity?
I have two SQL Tables.
One that is a person table
CREATE TABLE PERSON
(
ID INT IDENTITY(10000,1) NOT NULL,
Firstname VARCHAR(15),
Lastname VARCHAR(25) NOT NULL,
Birthdate DATE,
Gender VARCHAR(1),
CHECK ( GENDER IN ('M', 'F')),
Street VARCHAR(50),
City VARCHAR(15),
State VARCHAR(2),
CHECK (State IN ('FL','GA','PA')),
Zip INT,
Phone VARCHAR(10),
Employee VARCHAR(1),
CHECK ( Employee IN('Y','N')),
Member VARCHAR(1),
CHECK ( Member IN('Y','N')),
CHECK (Member IN ('Y') or Employee IN ('Y')),
CONSTRAINT PERSON_PK PRIMARY KEY (ID));
And Employee Table
CREATE TABLE EMPLOYEE
(
ID INT NOT NULL,
Datehired DATE DEFAULT GETDATE(),
Status VARCHAR(1),
CHECK ( Status IN ('F','C')),
Position VARCHAR(25),
EmpType VARCHAR(25),
CONSTRAINT EMPLOYEE_PK PRIMARY KEY (ID),
CONSTRAINT EMPLOYEE_PERSON_FK FOREIGN KEY (ID) REFERENCES PERSON);
Let's say someone isn't an employee. I can still insert them into the Employee Table.
INSERT INTO EMPLOYEE
(ID, Status, Position, EmpType)
VALUES
('10000','C','Teaching Classes','Instructor');
How Do I prevent this from happening.
One method is to have a redundant key:
alter table person
contraint unq_person_id_employee
unique (id, employee);
Then add a computed column to employee:
alter table employee add employee as ('Y') persisted;
Finally, add the constraint:
alter table employee
add constraint fk_employee_person
foreign key (id, employee) references person(id, employee);
Now, you are guaranteed that only employees are in the Employee table.
SQL Error
I'm not sure what I did wrong here
Here is the DDL I used to create my tables
Create Table HomeState (StateAbbreviation char(2) Primary Key,
StateName varchar(25));
Create Table Country (CountryAbbreviation char(2) Primary Key,
CountryName varchar(35));
Create Table Employee (EmployeeID Integer Primary Key NOT NULL,
FirstName varchar(20),
LastName varchar(30),
MI char(1),
HomeAddress varchar(30),
Zip char(5),
DateOfBirth date,
HireDate date,
TerminationDate date,
AnnualSalary number(20,2),
LicenseDate date,
StateAbbreviation char(2),
CountryAbbreviation char(2),
Foreign Key (StateAbbreviation) references HomeState,
Foreign Key (CountryAbbreviation) references Country);
Create Table Truck (VinNumber Integer Primary Key,
Make varchar(25),
Model varchar(30),
Year Integer,
PurchasePrice number(20,2),
LicenseNumber varchar(15));
Create Table EmployeeTruck (EmployeeID Integer,
VinNumber Integer,
Primary Key(EmployeeID,VinNumber),
Foreign Key (EmployeeID) references Employee,
Foreign Key (VinNumber) references Truck);
Create Table Accident (AccidentID Integer Primary Key,
DateOfAccident date,
AccidentDescription varchar(200),
AccidentLocation varchar(100),
EmployeeID Integer,
Foreign Key (EmployeeID) references Employee);
and here is the command i used to try and fill in the employee table
insert into employee
values ('1','brian','kim','j','adfasdf',
'1234','24-nov-1993','24-sep-1993','24-sep-1993',
'1234','24-sep-1993','as','as')
but it always gives me the error i put as the title of this question...
In the table "Employee", you say that Foreign Key (StateAbbreviation) references HomeState, and Foreign Key (CountryAbbreviation) references Country). The values you insert into Employee.HomeState and Employee.CountryAbbreviation have to exist in the tables HomeState and Country before you can insert into Employee.
Insert rows into HomeState and Country before you insert into Employee.
You have other problems, too. Here's an example.
Create Table HomeState (StateAbbreviation char(2) Primary Key,
StateName varchar(25));
insert into HomeState values ('AL', 'Alabama');
insert into HomeState values ('AM', 'Alabama');
insert into HomeState values ('AN', 'Alabama');
All those insert statements succeed. They shouldn't. In this case, StateName is also a candidate key.
Create Table HomeState (
StateAbbreviation char(2) Primary Key,
StateName varchar(25) not null unique
);
Let's take this a little further.
Create Table HomeState (
StateAbbreviation char(2) Primary Key,
StateName varchar(25) not null unique
);
Create Table Country (
CountryAbbreviation char(2) Primary Key,
CountryName varchar(35) not null unique
);
insert into HomeState values ('CA', 'California');
insert into Country values ('AF', 'Afghanistan');
insert into Employee (EmployeeID, StateAbbreviation, CountryAbbreviation)
values (-42, 'CA', 'AF');
The state "California, US" makes sense. The state "California, Afghanistan" doesn't.
An employee having no name doesn't make sense. Declare FirstName, LastName, and HireDate not null.
Bet on this: whatever nonsense your database allows will appear. It's just a matter of time.
I am currently working on some SQL coursework, this is my code so far:
CREATE TABLE VEHICLES
(
Vehicle_id VARCHAR(6) PRIMARY KEY NOT NULL,
Vehicle_Make VARCHAR(18),
Vehicle_Model VARCHAR(25),
Passenger_Number INT,
Number_Owned INT,
Registration_Date DATE, NOT NULL UNIQUE
Colour VARCHAR(10),
Rate INT
);
Each time I try and run the statement it gives me
SQL ERROR: ORA-00904: invalid identifier
You have a comma at the wrong place.
Here it is corrected:
CREATE TABLE VEHICLES
(
Vehicle_id VARCHAR(6) PRIMARY KEY NOT NULL,
Vehicle_Make VARCHAR(18),
Vehicle_Model VARCHAR(25),
Passenger_Number INT,
Number_Owned INT,
Registration_Date DATE NOT NULL UNIQUE,
Colour VARCHAR(10),
Rate INT
);