SQL Lookup List - sql

Question

I have been asked to create a table in SQL and am not sure about one of the table fields.
I have been asked to create a table with the following information:
First Name
Last Name
Three Address Lines
Mobile Phone
Home Phone
Date Modified
Person Category
Comment
This is the description for the Person Category:
Person Category:
Simple Lookup List contained in the database, (ID and Description), can pre-populate this data from the script, no need to edit and update from the VB application. Category descriptions are: Client, Worker, Assessor, and Unknown.
Can someone please explain to me what is needed here?
UPDATE
Here is my current script for the Person table:
CREATE TABLE db_person.Person
(
PersonID NUMBER NOT NULL,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
AddressLine1 varchar(50),
AddressLine2 varchar(50),
AddressLine3 varchar(50),
MobilePhone varchar(20),
HomePhone varchar(20),
DateModified DATE,
PersonCategory varchar(50),
Comment varchar(8000),
PRIMARY KEY (PersonID)
)
Can I have some help to create the Lookup List for the PersonCategory and to link it into the Person Table?

Answer 1

It means that you need to create another table for the Person Category. Thus a one-to-many relationship between the 2 tables.
Moreover because the description of a person is limited to either Client, Worker, Assessor or Unknown, you should be handle this in your script creation by using the keyword "CHECK".
i.e.
CHECK (Description in ("Client", "Worker", "Assessor", "Unknown"))

Answer 2

First of all you must create the Categories lookup table. You could create it with a script like this:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [Categories](
[Id] [uniqueidentifier] ROWGUIDCOL NOT NULL,
[Description] [varchar](50) NOT NULL,
CONSTRAINT [PK_Categories] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING ON
GO
ALTER TABLE [Categories] ADD CONSTRAINT [DF_Categories_Id] DEFAULT (newid()) FOR [Id]
GO
and populate it with the 4 descriptions:
INSERT INTO Categories ([Description])
VALUES ('Client')
INSERT INTO Categories ([Description])
VALUES ('Worker')
INSERT INTO Categories ([Description])
VALUES ('Assessor')
INSERT INTO Categories ([Description])
VALUES ('Unknown')
After that, you must create the Persons table, with the constraint with the Categories table:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [Persons](
[Id] [uniqueidentifier] ROWGUIDCOL NOT NULL,
[IdCategory] [uniqueidentifier] NOT NULL,
[FirstName] [varchar](50) NOT NULL,
[LastName] [varchar](50) NOT NULL,
[FirstAddress] [varchar](250) NULL,
[SecondAddress] [varchar](250) NULL,
[ThirdAddress] [varchar](250) NULL,
[HomePhone] [varchar](50) NULL,
[MobilePhone] [varchar](50) NULL,
[Modified] [datetime] NOT NULL,
[Comment] [varchar](500) NULL,
CONSTRAINT [PK_Persons] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING ON
GO
ALTER TABLE [Persons] ADD CONSTRAINT [DF_Persons_Id] DEFAULT (newid()) FOR [Id]
GO
ALTER TABLE [Persons] WITH CHECK ADD CONSTRAINT [FK_Persons_Categories] FOREIGN KEY([IdCategory])
REFERENCES [Categories] ([Id])
GO
ALTER TABLE [Persons] CHECK CONSTRAINT [FK_Persons_Categories]
GO
Now you have the two tables :)
These scripts run on Microsoft SQL Server.
PS: Best practice is to do another table for multiple addresses and multiple phones ;)
To retrieve data with the SELECT, you could do:
SELECT FirstName, LastName, Description AS Category
FROM Persons INNER JOIN
Categories ON Categories.Id = Persons.IdCategory
If you're using NUMBER for the IDs, change the IdCategory datatype in NUMBER. After that, the storedprocedure could be like:
CREATE PROCEDURE [AddPerson]
(
#Category varchar(50),
#FirstName varchar(50),
#LastName varchar(50),
#FirstAddress varchar(250) = NULL,
#SecondAddress varchar(250) = NULL,
#ThirdAddress varchar(250) = NULL,
#HomePhone varchar(50) = NULL,
#MobilePhone varchar(50) = NULL,
#Comment varchar(500) = NULL
)
AS BEGIN
Declare #idCategory NUMBER
Set #idCategory = SELECT Id FROM Categories WHERE Description = Category
INSERT INTO Persons ([IdCategory], [FirstName], [LastName],
[FirstAddress],
[SecondAddress],
[ThirdAddress],
[HomePhone],
[MobilePhone],
[Modified],
[Comment])
VALUES (#idCategory,
#FirstName,
#LastName,
#FirstAddress,
#SecondAddress,
#ThirdAddress,
#HomePhone,
GETDATE(),
#MobilePhone,
#Comment)
END
GO
I'm sorry if this codes contains some errors but I wrote it with notepad :)