Selon Michael Stassen <[EMAIL PROTECTED]>: > Mathias wrote: > > > Selon Russell Horn <[EMAIL PROTECTED]>: > > > >>This must have come up before, but I've not found it using a google > >>search. > >> > >>I have two tables customer and purchases > >> > >>customer: > >> customerID > >> customerName > >> > >>purchases: > >> purchaseID > >> customerID > >> purchaseDate > >> purchaseValue > >> > >>Is it possible in MySQL to join the tables so I only get the value of > >>the latest purchase? Or is this something that's better done in PHP, say > >>select all my customers and then one at a time do a query to select the > >>value of their last purchase? > >> > >>Thanks! > >> > >>Russell. > > > > Hi , > > join the tables with max(purchase_date) in the select,and of course group > by > > customer_id > > > > > > Hope that helps > > :o) > > Mathias > > Join with MAX(purchase_date)? Do you mean in a subquery? If so, that > requires 4.1. > > This is a FAQ. Three solutions are given in the manual, a subquery solution > for 4.1+, a temporary table solution for all versions, and a trick. > <http://dev.mysql.com/doc/mysql/en/example-maximum-column-group-row.html> > > Michael > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] > >
sorry if i wasn't clear. i mean not select puchase_date, but max(purshase_date), i.e. use having clause. The join field is certainly customerId, or .... There is not suffiscient info on tables. Hope that helps :o) Mathias -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
