What type of data I must use in the column (SQL)?

Hi Guys,
I have a little bit problem with this value (2_1232_123). I don´t know what type of value can be. This value is the result of the concatenation of three integer and "_".
The code I have is:
While readerCodeAccount.Read
Code_Account = readerCodeAccount.Item(0)
End While
Try
IDTextBox.Text = Code_Company & "-" & Code_Account

varchar(20)
But why storing it in the database if you can generate the concatenation on the fly in the SELECT statement
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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What type of data I must use in the column (SQL)?

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