SQL总分类

Question

我的查询向我提供了项目（eqmt）的结果

但是我需要按类别（单位）分组的每日总数，我正在调查内部联接，但这是我不知道的

这是总装备及其工作的查询。

SELECT hist_eqmtlist.unit,
       hist_statusevents.eqmt, 
       hist_exproot.shiftdate, 
       sum(case when hist_statusevents.category =1 then (hist_statusevents.duration/3600) else 0 end) as '1',
       sum(case when hist_statusevents.category =2 then (hist_statusevents.duration/3600) else 0 end) as '2',
       sum(case when hist_statusevents.category =3 then (hist_statusevents.duration/3600) else 0 end) as '3',
       sum(case when hist_statusevents.category =4 then (hist_statusevents.duration/3600) else 0 end) as '4',
       sum(case when hist_statusevents.category =5 then (hist_statusevents.duration/3600) else 0 end) as '5',
       sum(case when hist_statusevents.category =6 then (hist_statusevents.duration/3600) else 0 end) as '6'
FROM hist_eqmtlist,hist_exproot,hist_statusevents
WHERE hist_exproot.shiftindex = hist_statusevents.shiftindex And hist_statusevents.shiftindex = hist_eqmtlist.shiftindex And hist_statusevents.eqmt = hist_eqmtlist.eqmtid
GROUP BY hist_statusevents.eqmt, hist_exproot.shiftdate, hist_eqmtlist.unit
ORDER BY hist_exproot.shiftdate,hist_statusevents.eqmt

这是相同的查询，但结果是单位（类别）

SELECT hist_eqmtlist.unit,
       hist_exproot.shiftdate, 
       sum(case when hist_statusevents.category =1 then (hist_statusevents.duration/3600) else 0 end) as '1',
       sum(case when hist_statusevents.category =2 then (hist_statusevents.duration/3600) else 0 end) as '2',
       sum(case when hist_statusevents.category =3 then (hist_statusevents.duration/3600) else 0 end) as '3',
       sum(case when hist_statusevents.category =4 then (hist_statusevents.duration/3600) else 0 end) as '4',
       sum(case when hist_statusevents.category =5 then (hist_statusevents.duration/3600) else 0 end) as '5',
       sum(case when hist_statusevents.category =6 then (hist_statusevents.duration/3600) else 0 end) as '6'
FROM hist_eqmtlist,hist_exproot,hist_statusevents
WHERE hist_exproot.shiftindex = hist_statusevents.shiftindex And hist_statusevents.shiftindex = hist_eqmtlist.shiftindex And hist_statusevents.eqmt = hist_eqmtlist.eqmtid

GROUP BY hist_exproot.shiftdate, hist_eqmtlist.unit
ORDER BY hist_exproot.shiftdate

为什么我需要这个？

因为我需要把它放在我的php上然后放入嵌套表