查詢每週銷售記錄的數量：

SELECT COUNT(*),B.WEEK_BEG_DT FROM KYLIN_SALES AS A INNER JOIN KYLIN_CAL_DT AS B ON A.PART_DT=B.CAL_DT GROUP BY B.WEEK_BEG_DT ORDER BY B.WEEK_BEG_DT

查詢每週的銷售記錄總數、價格均值、總價：

SELECT COUNT(*) AS 數量,AVG(A.PRICE) AS 價格均值,SUM(A.PRICE) AS 總價, B.WEEK_BEG_DT  FROM KYLIN_SALES AS A INNER JOIN KYLIN_CAL_DT AS B ON A.PART_DT=B.CAL_DT GROUP BY B.WEEK_BEG_DT ORDER BY B.WEEK_BEG_DT LIMIT 200