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我有这张表,我想要唯一的面包 id,无论哪个先进入我希望它进入查询结果的表。

意味着在以下情况下,我想要这些具有以下 ID 的记录。

58 ,59 , 60 , 61 ,68 , 69

id 面包 id 异常时间
58 ID:D--113042539-54026-1363171110733-3:1:1:1:1 空 16:33.2
59 ID:D--113042539-54026-1363171110733-3:1:1:1:2 空 17:18.7
60 ID:D--113042539-54026-1363171110733-3:1:1:1:3 空 17:18.9
61 ID:D--113042539-54026-1363171110733-3:1:1:1:4 空 17:19.0
62 ID:D--113042539-54026-1363171110733-3:1:1:1:4 jmsexception 17:20.1
63 ID:D--113042539-54026-1363171110733-3:1:1:1:4 jmsexception 17:20.1
64 ID:D--113042539-54026-1363171110733-3:1:1:1:4 jmsexception 17:20.1
65 ID:D--113042539-54026-1363171110733-3:1:1:1:4 jmsexception 17:20.1
66 ID:D--113042539-54026-1363171110733-3:1:1:1:4 jmsexception 17:20.5
68 ID:D--113042539-54026-1363171110733-3:1:1:1:9 jmsexception 17:21.2
69 ID:D--113042539-54300-1363171861821-3:1:1:1:1 InvalidXPathExpression 22:28.1
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1 回答 1

2

询问:

SQLFIDDLE示例

SELECT `t1`.*
FROM Table1 t1
WHERE t1.id = (SELECT MIN(t.id)
               FROM Table1 t
               WHERE t.`bread id`= t1.`bread id`)

结果:

| ID |                                      BREAD ID |              EXCEPTION |    TIME |
-----------------------------------------------------------------------------------------
| 58 | ID:D--113042539-54026-1363171110733-3:1:1:1:1 |                 (null) | 16:33.2 |
| 59 | ID:D--113042539-54026-1363171110733-3:1:1:1:2 |                 (null) | 17:18.7 |
| 60 | ID:D--113042539-54026-1363171110733-3:1:1:1:3 |                 (null) | 17:18.9 |
| 61 | ID:D--113042539-54026-1363171110733-3:1:1:1:4 |                 (null) | 17:19.0 |
| 68 | ID:D--113042539-54026-1363171110733-3:1:1:1:9 |           jmsexception | 17:21.2 |
| 69 | ID:D--113042539-54300-1363171861821-3:1:1:1:1 | InvalidXPathExpression | 22:28.1 |
于 2013-03-13T12:50:59.320 回答