Problem with autogenerating employee id in sql server

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Hi friends
i am auto generating an employee id in sql server, but i didnt just wana use identity to generate it in the 1,2,3.... Sequence i want it in a format like this Emp00001 so decided to manipulate my code
here is my code to create the table

Create table employee ( ID int identity, EmployeeID as (('Emp') + replicate ('0', 8 - Len(ID)) + Cast (ID as Varchar)) persisted Primary Key, FirstName Varchar(50) not null, LastName Varchar(50) not null)

but the problem am having with this code is that after creating the table, sql server pops up two warnings that got me realy worried
here are the warnings:
Warning! The maximum key length is 900 bytes. The index 'PK_Employee_1A89E4E1' has maximum length of 800 bytes. For some combination of large values, the insert/update operation will fail.
Warning: The maximum length of the row exceeds the permissible limit of 8060 bytes. For some combination of large values, the insert/update operation will fail.

is the code i used good, or is not a good practice please i need sugestions
thanks

Posted 10-Jun-13 23:25pm

Ese ochuko

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gvprabu 11-Jun-13 5:34am

Hi why u need this values to store in table... u can use while show in front screen.
better store only Integer values

2 solutions

Solution 1

As long as your column EmployeeID does not exceed 800 bytes, there is no problem.

Posted 10-Jun-13 23:34pm

ManojABhole

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gvprabu · Accepted Answer · 2013-06-10T23:39:00

Solution 2

Hi,
For Best pratise use INT datatype for IDENTITY Column,Store only Integer values as EmaployeeID Column... while show to front end...try like this.

SQL

SELECT 'Emp'+RIGHT('00000'+CAST(Column_Name AS VARCHAR(10)),5)
FROM Your_Table

Regards,
GVPrabu

Posted 10-Jun-13 23:39pm

gvprabu

Updated 11-Jun-13 22:30pm

v2

Comments

CHill60 11-Jun-13 12:33pm

Did you mean CAST(1 AS VARCHAR(10)) or did you mean CAST(ID AS VARCHAR(10))

gvprabu 12-Jun-13 4:30am

Yes I means , CAST(ID AS VARCHAR(10))