MySQLの行番号が目的の結果を得られない

Question

私は以下のクエリを持っています。私は何をしたいのですか？これは、別個の顧客のためにどのような順序であるかを識別する列を追加することです。 entity_idはオーダーごとに一意であるため、私がしたいのは、created_atによって注文された各顧客の番号unique_idです。問題は、注文内のすべてのアイテムの行があるため、現在のクエリで間違った番号が付けられていることです。

これはこれはこれは、クエリで希望する結果

Order Date   ,OrderID, SKU ,Qty  ,Customer Email ,First,last ,seqnum 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','103','1.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','201','1.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','105','1.0000','test@google.com','joe','vers','1' 
'2015-04-13 17:45:15','20537','105','1.0000','test@google.com','joe','vers','2' 
'2015-04-13 17:45:15','20537','102','1.0000','test@google.com','joe','vers','2' 
'2015-04-13 17:45:15','20537','201','1.0000','test@google.com','joe','vers','2' 
'2015-04-13 17:45:15','20537','201','1.0000','test@google.com','joe','vers','2' 
'2015-04-29 14:42:28','22212','102','1.0000','test@google.com','joe','vers','3' 
'2015-05-11 17:11:22','23301','102','1.0000','test@google.com','joe','vers','4' 

ある現在の結果

Order Date   ,OrderID, SKU ,Qty  ,Customer Email ,First,last ,seqnum 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','1' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','2' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','3' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','4' 
'2015-04-01 14:48:13','19406','201','2.0000','test@google.com','joe','vers','5' 
'2015-04-01 14:48:13','19406','103','1.0000','test@google.com','joe','vers','6' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','7' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','8' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','9' 
'2015-04-01 14:48:13','19406','201','1.0000','test@google.com','joe','vers','10' 
'2015-04-01 14:48:13','19406','102','1.0000','test@google.com','joe','vers','11' 
'2015-04-01 14:48:13','19406','105','1.0000','test@google.com','joe','vers','12' 
'2015-04-13 17:45:15','20537','105','1.0000','test@google.com','joe','vers','13' 
'2015-04-13 17:45:15','20537','102','1.0000','test@google.com','joe','vers','14' 
'2015-04-13 17:45:15','20537','201','1.0000','test@google.com','joe','vers','15' 
'2015-04-13 17:45:15','20537','201','1.0000','test@google.com','joe','vers','16' 
'2015-04-29 14:42:28','22212','102','1.0000','test@google.com','joe','vers','17' 
'2015-05-11 17:11:22','23301','102','1.0000','test@google.com','joe','vers','18' 

です：

select sfo.created_at AS "Order Date", sfo.entity_id AS "Order ID", 
     left(sfoi.sku,3) AS "SKU", sfoi.qty_ordered, 
     sfo.customer_email AS "Customer Email",  
     sfo.customer_firstname AS "Customer Firstname",  
     sfo.Customer_lastname AS "Customer Lastname", 
     (@rn := if(@e = sfo.customer_email, @rn + 1, 
        if(@e := sfo.customer_email, 1, 1) 
       ) 
     ) as seqnum 
from sales_flat_order sfo join 
    sales_flat_order_item sfoi 
    on sfoi.order_id = sfo.entity_id join 
    sales_flat_order_address sfoa   
    on sfoa.entity_id = sfo.billing_address_id cross join 
    (select @rn := 0, @e := '') params 
order by sfo.customer_email, created_at; 

Answer 1

ああ、私は参照してください。 の注文は、のメールに基づいた番号です。はい。

select sfo.created_at AS "Order Date", sfo.entity_id AS "Order ID", 
     left(sfoi.sku,3) AS "SKU", sfoi.qty_ordered, 
     sfo.customer_email AS "Customer Email",  
     sfo.customer_firstname AS "Customer Firstname",  
     sfo.Customer_lastname AS "Customer Lastname", 
     (@rn := if(@e = sfo.customer_email, 
        if(@o = sfo.entity_id, @rn, 
        if(@o := sfo.entity_id, @rn + 1, @rn + 1 
         ) 
        ), 
        if(@e := sfo.customer_email, 
        if(@o := sfo.entity_id, 1, 1), 
        if(@o := sfo.entity_id, 1, 1) 
        ) 
       ) 
     ) as seqnum 
from sales_flat_order sfo join 
    sales_flat_order_item sfoi 
    on sfoi.order_id = sfo.entity_id join 
    sales_flat_order_address sfoa   
    on sfoa.entity_id = sfo.billing_address_id cross join 
    (select @rn := 0, @e := '', @o := -1) params 
order by sfo.customer_email, created_at, orderid; 

これはcreated_atは、各オーダーについて同じであると仮定しています。