MySql do an increment based on country code

Hi Guys,

I have this table built like this, which assigns a unique articleId starting with zero for each user.

CREATE TABLE `articles` (
`artcId` INT(10) NOT NULL AUTO_INCREMENT,
`artcUserId` INT(10) NOT NULL DEFAULT '0',
`artcStackId` INT(10) NOT NULL DEFAULT '0',
`artcTitle` VARCHAR(200) NULL DEFAULT NULL,
PRIMARY KEY (`artcUserId`, `artcId`)
)
COLLATE='utf8_general_ci'
ENGINE=MyISAM;


There also is a part which assigns a running serial number (artcStackId) to each article. You'll see in the code.

Thing is, is it somehow possible to assign a artcStackId based on the country of the user? That country code will come from php.

Eg: If it's US then start from 10001+1, if its UK start from 20001+1, if its CA then start from 30001+1 and on & on.

Will it be possible to do this?

My current SQL query goes as follows:

insert into articles (artcUserId,artcStackId,artcCountry,artcTitle) select 4,IFNULL((MAX(artcStackId)+1) ,0),'US','Hello World' FROM articles;

But the way I want it it'll have to go like (this is just an example sql):

insert into articles (artcUserId,artcStackId,artcCountry,artcTitle) select 4,IF artcCountry = 'US' then(selct MAX(artcStackId)+1 where artcCountry = 'US'),'US','Hello World' FROM articles;


Any idea how this can be done? Thanks.