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如果我没有得到结果,我想创建一个 sql 查询来检索两个日期 T1 和 T2 之间的元素,我想得到这些日期之外的结果。我怎么能只使用 sql

select * from myTable where tmp >= T1 and tmp <= T2
select * from myTable where tmp < T1 or tmp > T2
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2 回答 2

0

与此类似的查询应该可以工作:

(select * from myTable where tmp >= T1 and tmp <= T2)
UNION 
(select * from myTable WHERE NOT EXISTS (select 1 from myTable where tmp >= T1 and tmp <= T2) AND tmp < T1 or tmp > T2)

考虑到目前提供的详细信息,这未经测试。

于 2013-10-04T09:12:39.290 回答
0

下面的查询应该可以解决这个问题:

SELECT * 
FROM myTable 
WHERE
(tmp BETWEEN T1 AND T2)
OR
((tmp < T1 OR tmp > T2) AND (tmp NOT BETWEEN T1 AND T2))
于 2013-10-04T10:00:24.693 回答