Question

我希望你能帮助我。我在下面的查询成功运行并返回大约100行。

SELECT DOMAIN_NAME AS "Domain", PROJECT_NAME AS "Project", MAX(END_TIME) AS "Last Accessed"
FROM DB.td.SESSIONS_HISTORY
WHERE SESSIONS_HISTORY.USER_NAME NOT IN ('UserA', 'UserB', 'UserC')
GROUP BY DOMAIN_NAME, PROJECT_NAME
ORDER BY DOMAIN_NAME, PROJECT_NAME

但是，在返回的数据集中有两行包含相同的项目名称，即

Domain      Project  Last Accessed
PASSENGERS  Alpha    2015-02-25 10:56:36
AIRPORTS    Alpha    2015-01-09 11:11:50

我想从数据集中明确排除AIRPORTS Alpha行。阅读了其他帖子后，我尝试了下面的查询（及其变体），但我返回了0行，这不是理想的结果。

SELECT DOMAIN_NAME AS "Domain", PROJECT_NAME AS "Project", MAX(END_TIME) AS "Last Accessed"
FROM DB.td.SESSIONS_HISTORY
WHERE NOT EXISTS (
    SELECT * FROM DB.td.SESSIONS_HISTORY
    WHERE SESSIONS_HISTORY.DOMAIN_NAME = 'AIRPORTS' AND SESSIONS_HISTORY.PROJECT_NAME = 'Alpha'
    )
AND SESSIONS_HISTORY.USER_NAME NOT IN ('UserA', 'UserB', 'UserC')
GROUP BY DOMAIN_NAME, PROJECT_NAME
ORDER BY DOMAIN_NAME, PROJECT_NAME

如何修改我的查询以排除AIRPORTS Alpha行？请注意，我不需要根据日期字段排除的解决方案，只需要DOMAIN_NAME和PROJECT_NAME的组合。提前谢谢。

Answer 1

试试这个

SELECT DOMAIN_NAME AS "Domain", PROJECT_NAME AS "Project", MAX(END_TIME) AS "Last Accessed"
FROM DB.td.SESSIONS_HISTORY
WHERE SESSIONS_HISTORY.USER_NAME NOT IN ('UserA', 'UserB', 'UserC')

and (DOMAIN_NAME <> 'AIRPORTS' or PROJECT_NAME <> 'Alpha')

GROUP BY DOMAIN_NAME, PROJECT_NAME
ORDER BY DOMAIN_NAME, PROJECT_NAME

Answer 2

为同一DOMAIN_NAME / PROJECT_NAME组合选择end_time = max（end_time）的行：

SELECT DOMAIN_NAME AS "Domain",
       PROJECT_NAME AS "Project",
       END_TIME AS "Last Accessed"
FROM DB.td.SESSIONS_HISTORY t1
WHERE USER_NAME NOT IN ('UserA', 'UserB', 'UserC')
AND END_TIME = (SELECT MAX(END_TIME)
                FROM DB.td.SESSIONS_HISTORY t2
                WHERE USER_NAME NOT IN ('UserA', 'UserB', 'UserC')
                  AND t1.DOMAIN_NAME = t2.DOMAIN_NAME
                  AND t1.PROJECT_NAME = t2.PROJECT_NAME)
ORDER BY DOMAIN_NAME, PROJECT_NAME

Answer 3

SELECT DOMAIN_NAME AS "Domain", PROJECT_NAME AS "Project", MAX(END_TIME) AS "Last Accessed"
FROM DB.td.SESSIONS_HISTORY
WHERE SESSIONS_HISTORY.USER_NAME NOT IN ('UserA', 'UserB', 'UserC')
AND DOMAIN_NAME <> 'AIRPORTS'
AND PROJECT_NAME <> 'Alpha'
GROUP BY DOMAIN_NAME, PROJECT_NAME
ORDER BY DOMAIN_NAME, PROJECT_NAME

Answer 4

提供了两个对我有效的答案。

感谢@Arvo：

SELECT DOMAIN_NAME AS "Domain", PROJECT_NAME AS "Project", MAX(END_TIME) AS "Last Accessed"
FROM DB.td.SESSIONS_HISTORY
WHERE SESSIONS_HISTORY.USER_NAME NOT IN ('UserA', 'UserB', 'UserC')
AND NOT (DOMAIN_NAME = 'AIRPORTS' AND PROJECT_NAME = 'Alpha')
GROUP BY DOMAIN_NAME, PROJECT_NAME
ORDER BY DOMAIN_NAME, PROJECT_NAME

感谢@ASh同样有效：

SELECT DOMAIN_NAME AS "Domain", PROJECT_NAME AS "Project", MAX(END_TIME) AS "Last Accessed"
FROM DB.td.SESSIONS_HISTORY
WHERE SESSIONS_HISTORY.USER_NAME NOT IN ('UserA', 'UserB', 'UserC')
AND (DOMAIN_NAME <> 'AIRPORTS' or PROJECT_NAME <> 'Alpha')
GROUP BY DOMAIN_NAME, PROJECT_NAME
ORDER BY DOMAIN_NAME, PROJECT_NAME

根据同一个表中两列的内容排除单行

4 个答案: