Sql 从表中选择多个max（）

首先，我要说的是，表结构（不幸地）已经设置好了

我的目标是从查询中选择几个

max（）

。假设我有以下表格

          jobReferenceTable                     jobList
 jobID | jobName  | jobDepartment |        listID |  jobID  |
_______|__________|_______________|        _______|_________|
   1   | dishes   |   cleaning    |          1    |    1    |
   2   |vacumming |   cleaning    |          2    |    5    |
   3   | mopping  |   cleaning    |          3    |    2    |
   4   |countMoney|     admin     |          4    |    4    |
   5   | hirePpl  |     admin     |          5    |    1    |
                                             6    |    2    |
                                             7    |    3    |
                                             8    |    3    |
                                             9    |    1    |
                                             10   |    5    |

不知何故，我希望有一个从清理中选择作业ID的查询，然后显示每个作业的最新作业列表ID。我在下面开始了一个查询，下面是我希望得到的结果

质疑

结果

 jobName | jobDepartment | listID |
 ________|_______________|________|
    1    |    cleaning   |    9   |
    2    |    cleaning   |    6   |
    3    |    cleaning   |    8   |

试试这个

SELECT jrt.jobName, jrt.jobDepartment, MAX(jl.listID)
FROM jobReferenceTable AS jrt INNER JOIN jobList AS jl ON jrt.jobID = jl.jobID
WHERE jrt.jobDepartment = 'cleaning'
GROUP BY jrt.jobName, jrt.jobDepartment

据我所知，您只需要一个

MAX（）

，

listID

MAX（）

SELECT jrt.jobName, jrt.jobDepartment, MAX(jl.listID)
FROM jobReferenceTable AS jrt INNER JOIN jobList AS jl ON jrt.jobID = jl.jobID
WHERE jrt.jobDepartment = 'cleaning'
GROUP BY jrt.jobName, jrt.jobDepartment