mysql：在函数

Question

我正试图从t5表中获取价值，如下t4.slot匹配t5.Id使用案例，但总是从第一行获得价值，当t4.slot Id='2'时，它将从t5第二行值获得值。

table：t1 数据来自此表

预期输出

table：t5 我正在尝试将此表字段用作根据ID的函数之间的条件。

select t1.TraineeID, 
       t3.BatchID,
       t4.Slot,
       t2.attnDate,
       min(t1.attnTime) as in_time, 
       max(t1.attnTime) as out_time,
       (CASE WHEN t5.ID='1' and t1.attnTime<t5.inTime THEN 'P' 
             WHEN t5.ID='2' and t1.attnTime<t5.inTime THEN 'P'
        ELSE 'Late-In' END) AS Status
from tbl_attn_temp t1, tbl_assigned t3
join (select distinct attnDate from tbl_attn_temp)t2
left outer join tbl_batch t4 on t3.BatchID=t4.BatchID
left outer join tbl_threshold t5 on t4.Slot=t5.ID
where t1.attndate = t2.attnDate and t1.TraineeID=t3.TraineeID 
and t4.Slot=(CASE 
     WHEN t5.ID='1' THEN t1.attnTime BETWEEN t5.minLimit AND t5.maxLitmit
     WHEN t5.ID='2' THEN t1.attnTime BETWEEN t5.minLimit AND t5.maxLitmit
     END)
group by t1.TraineeID, t2.attnDate

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