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 padding a field in a table
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Posted - 12/07/2012 :  13:39:07  Show Profile  Reply with Quote
I have a table that had a field which was a int but I was asked to change it to a varchar(5).

I did this but now my client is requesting that all numbers be 5 chars long. This means that I have to pad any numbers that are 4 chars long with a zero.

i.e. 1234 will become '01234'

I am not a DBA by any means so I am asking how to do this? I am just updating one field but there may be multiple occurances of a value in the field.

The field that I want to update is A and the field B is a unique field.


Flowing Fount of Yak Knowledge

5155 Posts

Posted - 12/07/2012 :  13:46:03  Show Profile  Reply with Quote
Customer is almost always right, but this may be a case where they are not.

If the data is numeric and if it is currently stored in a column that is of numeric data type, keep it that way.

When you want to select, simply cast it to varchar(5) like shown below and return the results:
SELECT RIGHT('00000'+CAST(YourColumn AS VARCHAR(5)),5) FROM YourTable

Another possibility is to create a computed column.
ALTER TABLE YourTable ADD CharCol AS RIGHT('00000'+CAST(YourColumn AS VARCHAR(5)),5);
Then select Charcoal instead of Yourcolumn.

Edit: If you have already changed it to varchar(5) and just want to pad with zeros, do this
UPDATE YourTable SET YourColumn = RIGHT('00000'+CAST(YourColumn AS VARCHAR(5)),5);

Edited by - sunitabeck on 12/07/2012 13:48:18
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Starting Member

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Posted - 12/07/2012 :  13:51:56  Show Profile  Reply with Quote
Thanks. Yes, I have already changed the field so your update statement worked great.
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22864 Posts

Posted - 12/24/2012 :  06:45:20  Show Profile  Send madhivanan a Yahoo! Message  Reply with Quote
This is the formation issue. Just do this while SELECTing data


Failing to plan is Planning to fail
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