Computed fields in MySQL

I need to create a computed field in MySQL in which the contents of two fields are concatenated for another field and put into a record. I have a field called id which is the companies ID number and I also have another field called category which contains a code for the type of business which the company is. I then finally have a field called voucherid which will contain the results of the previous fields concatenated together. For example:

if the fields had the following values
id = 12
category = CZ

Then voucherid = CZ12

I found the following page on it: http://archives.neohapsis.com/archives/mysql/2004-q3/3000.html

but I couldn't get it to work.

Here is the query which I typed in:

[code]
ALTER TABLE business ADD COLUMN voucherid COMPUTED BY (category || id)
[/code]

It failed - I got some syntax error.

Please could someone give me a query (or correct mine) which will accomplish what is (I'm sure) a relatively simple task?

Please help. Many thanks.

ITA
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Categories