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Question

我是Oracle的新手（幾個小時）。 我的經驗全是MySQL。

我的查詢在我看來是非常基本的，但是group by似乎並沒有返回預期的結果。 經過幾個小時的搜索，我希望這里的人能為您提供幫助！

這是我的代碼：

SELECT trunc(start_time), display_name, count(*)
FROM TblName
WHERE (DISPLAY_NAME like '%Advise the customer how they can change their marketing preferences%')
      OR (DISPLAY_NAME like '%Inform customer on relevant ads%')
      OR (DISPLAY_NAME like '%Is the customer requesting to block%')
GROUP BY start_time, display_name
HAVING start_time >= '2013-10-24';

我得到的結果將有多個行，這些行具有相同的start_time，display_name和1計數。查詢中返回了400多個行，並且所有計數均為1。

編輯：下面是結果。 因此，我現在了解了為什么group by無法正常工作。 在MySQL中，我將使用date（start_time）來更正此問題。 Oracle有類似的東西嗎？

11-SEP-13 02.16.42.809000000 PM Advise the customer how they can change their marketing preferences.    1
25-SEP-13 11.56.05.814000000 AM Advise the customer how they can change their marketing preferences.    1
26-SEP-13 11.17.29.737000000 AM Advise the customer how they can change their marketing preferences.    1
24-OCT-13 10.53.17.941000000 AM Advise the customer how they can change their marketing preferences.    1
26-OCT-13 10.24.25.099000000 AM Is the customer requesting to block?    1
23-OCT-13 08.28.58.234000000 PM Advise the customer how they can change their marketing preferences.    1
25-OCT-13 02.50.49.329000000 PM Inform customer on relevant ads 1
26-OCT-13 11.46.45.686000000 AM Advise the customer how they can change their marketing preferences.    1
28-OCT-13 10.12.31.613000000 AM Inform customer on relevant ads 1
25-OCT-13 11.38.24.570000000 AM Inform customer on relevant ads 1

提前致謝！

Answer 1

您需要將trunc（start_time）應用於組，例如：

SELECT trunc(start_time), display_name, count(*)
FROM TblName
WHERE (DISPLAY_NAME like '%Advise the customer how they can change their marketing preferences%')
      OR (DISPLAY_NAME like '%Inform customer on relevant ads%')
      OR (DISPLAY_NAME like '%Is the customer requesting to block%')
GROUP BY trunc(start_time), display_name
HAVING trunc(start_time) >= '2013-10-24';