Question

我有一个包含[Account_No，Transaction_Amount，Transaction_Date和Transaction_Time]列的表。我想选择交易金额超过2,000,000 /的交易账户和10分钟内的交易时间＆＃34;一天内。对此有什么疑问。请帮忙。我正在使用Teradata。

此致

Khawar

Answer 1

一种方式是自联接（因为Teradata没有实现RANGE OVER语法），如下所示：

SELECT t1.Account_No,
   t1.Transaction_Date,
   t1.Transaction_Time, 
   Sum(t2.Transaction_Amount) AS sumamt
FROM tab AS t1
JOIN tab AS t2
  ON t1.Account_No = t2.Account_No
 -- same day within the next ten minutes of a transaction
 AND t2.Transaction_Date = t1.Transaction_Date
 AND t2.Transaction_Time BETWEEN t1.Transaction_Time
                             AND t1.Transaction_Time + INTERVAL '10' MINUTE
GROUP BY 1,2,3
HAVING sumamt >= 2000000 -- more than 2 mio
QUALIFY 
   Row_Number() -- only one row per account/day
   Over (PARTITION BY t1.Account_No, t1.Transaction_Date
         ORDER BY t1.Transaction_Time) = 1

在Teradata中按时间分组查询结果

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