SQL查询CASE WHEN语句

Question

我正在做一个SQL查询试图通过移位来计算生产...当我运行这个查询时...它会返回5-FG位置的东西，因为它有一个移位3 ...这是怎么回事甚至可能？

SELECT * FROM (select pt_desc1, pt_desc2, tr_part, tr_loc, tr_time, case when custpart = '' then         tr_part else custpart end as custpart, sum(tr_qty_loc) as 'Total', 
CASE WHEN tr_loc = '6-LDT2' then 'Dakkota'
    WHEN tr_loc = '5-FG' then 'Dexsys' end as 'location',
CASE WHEN tr_time > '14400' AND tr_time < '50400' AND tr_loc = '6-LDT2'Then '1'
    WHEN tr_time > '50400' AND tr_time < '75600' AND tr_loc = '6-LDT2' Then '2' 
    WHEN tr_time > '75600' OR tr_time < '14400' AND tr_loc = '6-LDT2' Then '3'
    WHEN tr_time > '21600' AND tr_time < '59400' AND tr_loc = '5-FG' Then '1'
    WHEN tr_time > '59400' or tr_time < '21600' AND tr_loc = '5-FG' Then '2' end as 'Shift'
from tr_hist_sql
join pt_mstr_sql on tr_part = pt_part
join cp_mstr_sql on pt_part = intpart
where tr_loc IN ('5-FG') 
and tr_type = 'rct-wo' 
group by tr_part, pt_desc1, pt_desc2, tr_loc, tr_time, case when custpart = '' then tr_part else      custpart end, CASE WHEN tr_time > '14400' AND tr_time < '50400' AND tr_loc = '6-LDT2' Then '1'
WHEN tr_time > '50400' AND tr_time < '75600' AND tr_loc = '6-LDT2' Then '2' 
WHEN tr_time > '75600' OR tr_time < '14400' AND tr_loc = '6-LDT2' Then '3'
WHEN tr_time > '21600' AND tr_time < '59400' AND tr_loc = '5-FG' Then '1'
    WHEN tr_time > '59400' or tr_time < '21600' AND tr_loc = '5-FG' Then '2'  end,
CASE WHEN tr_loc = '6-LDT2' then 'Dakkota'
    WHEN tr_loc = '5-FG' then 'Dexsys' end
having sum(tr_qty_loc) > 0) as dt
where Shift = 1 or shift = 2 or shift =3

按tr_part命令

Answer 1

我猜是这行：

当tr_time＆gt; ＆＃39; 75600＆＃39;或tr_time＆lt; ＆＃39; 14400＆＃39;和tr_loc =＆＃39; 6-LDT2＆＃39;那么＆＃39; 3＆＃39;

被解释为：

当tr_time＆gt; ＆＃39; 75600＆＃39;或者（tr_time＆lt;＆＃39; 14400＆＃39;和tr_loc =＆＃39; 6-LDT2＆＃39;）然后＆＃39; 3＆＃39;

然后会出现第一个条款：

当tr_time＆gt; ＆＃39; 75600＆＃39;

哪个满足OR语句，给出的值为＆＃39; 3＆＃39; 。