3
我將首先說表結構(不幸)被設置。從表中選擇幾個max()
我的目標是從查詢中選擇幾個max()
。比方說,我有以下表
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 |
不知怎的,我想有一個從清洗選擇作業ID的,然後顯示在最近一次作業表ID對每個作業的查詢。我開始查詢和低於是什麼,我希望能得到作爲結果
查詢
SELECT jrt.jobName, jrt.jobDepartment
FROM jobReferenceTable
WHERE jobDepartment = 'cleaning'
JOIN jobList jl ON jr.jobID = jl.jobID
結果
jobName | jobDepartment | listID |
________|_______________|________|
1 | cleaning | 9 |
2 | cleaning | 6 |
3 | cleaning | 8 |