Actualización de una fila duplicada en mysql en una columna que puede agregar o cambiar su nombre

I am importing an xml feed into database using simple_xml_loadfile. The entries are pretty basic, but sometimes they either change or have values appended to them or both.

card name - citi thankyou card<br>
apr - 0%<br>
balance transfer - yes<br>
bullets - 0% balance transfer 18 months|2x points on all purchases|No annual fee<br>
annual fee - 0<br>
purchase apr 11.99-22.99%<p>

What I want to setup is an insert on duplicate entry so that if either the citi thankyou card changes its name to citi thankyou card - balance transfer offer or citibank thankyou card it won't add another entry, as typically everything else will stay the same, or the bullets may change.

Most of the xml fields I read from with credit cards has a unique id for the card, however this xml file does not. So if the unique id was 234567 I could check for that id and change the card name from citi thankyou card to citi thank you card

What's the best way to do this, should I manually assign a card id to each card or can a primary key with auto-increment do the trick?

Long story short I don't want it to have 1 row with citi thankyou card and another row with citibank thankyou card since they would be the same card with a simple name change.

preguntado el 27 de noviembre de 13 a las 05:11

so what have you tried till now -

I have insert into tbl(cardname, apr, bt, bullets, annfee, purapr) values ($cardname, $apr, $bt, $bullets, $annfee, $purapr) on duplicate key update (everything but cardname) as I set cardname to unique key. The majority of the updates won't reflect the cardname, but on occasion it does, and my concern is I will end up with old cardname and new cardname, so I don't know how to distinguish old from new when the cardname changes A prime example of the card changes is going from (SM) to (TM) or (SM) to &reg; (Citi Thankyou Card(SM)) becomes (Citi Thankyou Card&reg;) etc -

1 Respuestas

A primary key and auto increment.

I'd also suggest using a select query to check for duplicates before inserting:

SELECT DISTINCT BINARY tblName

this will ignore whitespaces... 

'citi thankyou card' = 'citi thank you card'

respondido 27 nov., 13:05

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