使用求和分區計算

Question

我運行下面的代碼來計算累計值

SELECT 
    iid 
    ,item_id 
    ,pg_purch_ind 
    ,SUM_score1 
    ,SUM(pg_purch_ind) OVER(PARTITION BY item_id ORDER BY SUM_score1 DESC, iid % 100, iid) AS cum_pg_purch 
into table2 
FROM table1 

累計值，但它具有以下錯誤「附近有語法錯誤‘秩序’。」有誰知道這是什麼問題？

Answer 1

這裏是一個較小的版本

;WITH cte 
    AS (SELECT iid, 
       item_id, 
       pg_purch_ind, 
       SUM_score1, 
       Row_number()OVER(partition BY item_id ORDER BY SUM_score1 DESC, iid % 100, iid) AS rn 
     FROM Yourtable) 
SELECT iid, 
     item_id, 
     pg_purch_ind, 
     SUM_score1, 
     cum_pg_purch 
FROM cte a 
     CROSS apply (SELECT Sum (pg_purch_ind) 
        FROM cte b 
        WHERE a.item_id = b.item_id 
          AND b.rn <= a.rn) cs (cum_pg_purch) 

不會產生Row_Number的解決方法是相當困難的交叉處理適用，因爲模運算