Question

First off, I am a beginner in SQL just learning and I am stuck on one problem looked everywhere but not able to find an answer for it.

SCHEMA: time_ts TIMESTAMP,id BYTES,sale_amount FLOAT,client STRING.

The report I am trying to export is the clients who are newly acquired within the last 12 months that has made 2 and 3 purchase over the last 12 months as well.

DATA SAMPLE:
Row time_ts id  sale_amount client   
1   2011-12-02 16:17:01.280 UTC James   97.67   104795   
2   2010-03-29 19:43:07.723 UTC Mark    90.0    106186   

EXPECTED RES
Number_of_Orders Revenue_Total Year Total_Num_of_orders
1, 100$ 2010 60
2, 150$ 2010 65

What I have so far ( Which returns 0 results):

SELECT client, COUNT(id) AS sales, MIN(time_ts),
FROM [bigquery-public-data:hacker_news.comments]
WHERE time_ts >= TIMESTAMP(time_ts) > DATE_ADD(USEC_TO_TIMESTAMP(NOW()), -12, 'MONTH')
GROUP BY client
HAVING COUNT(id) = 2;

Answer 1

你很亲密。但where中的条件需要位于having：

SELECT client, COUNT(id) AS sales, MIN(time_ts),
FROM [bigquery-public-data:hacker_news.comments]
GROUP BY client
HAVING COUNT(id) = 2 AND
       MIN(time_ts) > DATE_ADD(USEC_TO_TIMESTAMP(NOW()), -12, 'MONTH');

我假设日期算术是正确的。我不久前停止使用旧版SQL，你也应该使用标准SQL。

Using MIN(TIMESTAMP) in WHERE

1 个答案: