我想计算一篮子客户购买的平均数量
(1篮子= 1天内购买多件商品)
从表事务中将其更新为cust360.average_basket_Qty
交易: -
Trasactions_ID cust_id Tran_date Qty Total_amt
80712190438 270351 2014-02-28 00:00:00.000 5 4265.3
29258453508 270384 2014-02-27 00:00:00.000 5 8270.925
51750724947 273420 2014-02-24 00:00:00.000 2 1748.11
93274880719 271509 2014-02-24 00:00:00.000 3 4518.345
51750724947 273420 2014-02-23 00:00:00.000 2 1748.11
97439039119 272357 2014-02-23 00:00:00.000 2 1821.04
45649838090 273667 2014-02-22 00:00:00.000 1 1602.25
Cust360表: -
Cust_id Gender Age Basket_count Total_sale Date Average_basket_Qty
266783 M 525 0 3113 2013-02-20 NULL
266784 F 314 1 5694 2012-12-04 NULL
266785 F 392 0 21613 2013-08-01 NULL
266788 F 551 0 6092 2013-02-12 NULL
266794 F 564 1 27981 2014-02-12 NULL
答案 0 :(得分:0)
以下查询应该适合您
UPDATE DEST
SET DEST.Average_basket_Qty = SRC.AVG_QTY
FROM Cust360 DEST
INNER JOIN
(
SELECT CUST_ID, CAST(TRAN_DATE AS DATE), AVG(QTY) AVG_QTY
FROM Transactions
GROUP BY CUST_ID,CAST(TRAN_DATE AS DATE)
) SRC ON SRC.CUST_ID=DEST.Cust_id