Question

我正在使用内部联接，我希望将2个结果组合在一起显示在singel表中我已创建查询以检查延迟和提前退出现在我希望两个输出显示为一个singel表查询lateComing：

    select k.EmpId,Min(k.DateofCheckin) as mindate,
    case 
    when min(time(DateofCheckin))<=@i then 'Ontime'
    when min(time(DateofCheckin)) between @i and @j then 'Late'
    when min(time(DateofCheckin)) between @j and @n then 'HalfDay'
    when DAYOFWEEK(Date(DateofCheckin)) =7 and  min(time(DateofCheckin)) >@j  then 'HalfDay'
    else 'Absent' end as LoginStatus
    from CheckInLogs k Join
    (select 
    @i:=time(r.LateComer) as LateComing,
    @j:=time(r.LateComingEndTime) as LateComingEnd,
    @m:=time(LunchStartTime),
    @n:=time(LunchEndTime),
    @o:=time(EarlyLeavingStartTime),
    @p:=time(EarlyLeavingEndTime), 
    e.EmpId
    FROM Employees e JOIN Profiles r ON e.LeaveProfile=r.ProfileName) h
    on k.EmpId=h.EmpId
    where k.DateofCheckin='in'  and  
    DAYOFWEEK(Date(k.DateofCheckin)) != 1 and
    k.BranchId=1 and date(DateofCheckin) between '2013-05-1' and '2013-05-29'
    group BY date(k.DateofCheckin),k.EmpId

查询EarlyLeaving：

select 
    EmpId,Date(DateofCheckin) as LogoutDate,DateofCheckin,max(time(DateofCheckin)) as LogoutTime,
    case 
    when max(time(DateofCheckin))>=@p then 'Ontime'
    when DAYOFWEEK(Date(DateofCheckin)) =7 and  max(time(DateofCheckin)) < @m
    then 'HalfDay'
    when DAYOFWEEK(Date(DateofCheckin)) =7 and  max(time(DateofCheckin)) > @m  then 'Ontime'
    when max(time(DateofCheckin)) between @o and @p then 'EarlyLeaving'
    when max(time(DateofCheckin)) between @m  and @o then 'HalfDay'
    when max(time(DateofCheckin))<=@m then 'Absent'
    else 'Absent' end as LogoutStatus
    from CheckInLogs k1 Join
    (select 
    @i:=time(r.LateComingStartTime) as LateComing,
    @j:=time(r.LateComingEndTime) as LateComingEnd,
    @m:=time(LunchStartTime),
    @n:=time(LunchEndTime),
    @o:=time(EarlyLeavingStartTime),
    @p:=time(EarlyLeavingEndTime), 
    e.EmpId
    FROM Employees e JOIN Profiles r ON e.LeaveProfile=r.ProfileName) h1
    on k1.EmpId=h1.EmpId
    where k1.DateofCheckin='Out' 
    and k1.BranchId=1
    and DAYOFWEEK(Date(k1.DateofCheckin)) != 1 and  
    date(k1.DateofCheckin) between '2013-06-1' and '2013-06-29'
    group BY date(k1.DateofCheckin),k1.EmpId

Answer 1

以下是我如何处理查询的示例，这是一个快速复制和过去的工作，因此您必须修复语法错误等。主要区别在于您只需要在查询开始时获取一次员工详细信息，并在两个当前查询（员工除外）之间添加公共字段以加入。在这种情况下，我使用了logoutdate

select *
from (select 
    @i:=time(r.LateComer) as LateComing,
    @j:=time(r.LateComingEndTime) as LateComingEnd,
    @m:=time(LunchStartTime),
    @n:=time(LunchEndTime),
    @o:=time(EarlyLeavingStartTime),
    @p:=time(EarlyLeavingEndTime), 
    e.EmpId
FROM Employees e JOIN Profiles r ON e.LeaveProfile=r.ProfileName) h
JOIN (select 
        EmpId, Date(DateofCheckin) as LogoutDate,
        DateofCheckin,max(time(DateofCheckin)) as LogoutTime,
        case 
            when max(time(DateofCheckin))>=@p then 'Ontime'
            when DAYOFWEEK(Date(DateofCheckin)) =7 and  max(time(DateofCheckin)) < @m
                then 'HalfDay'
            when DAYOFWEEK(Date(DateofCheckin)) =7 and  max(time(DateofCheckin)) > @m                  then 'Ontime'
            when max(time(DateofCheckin)) between @o and @p then 'EarlyLeaving'
            when max(time(DateofCheckin)) between @m  and @o then 'HalfDay'
            when max(time(DateofCheckin))<=@m then 'Absent'
        else 'Absent' end as LogoutStatus
      from CheckInLogs k1    
      where k1.DateofCheckin='Out' 
      and k1.BranchId=1
      and DAYOFWEEK(Date(k1.DateofCheckin)) != 1
      group BY date(k1.DateofCheckin), k1.EmpId) out
ON out.empid = h.empid
JOIN (select k.EmpId, Date(DateofCheckin) as LogoutDate,
                Min(k.DateofCheckin) as mindate,
                case 
                    when min(time(DateofCheckin))<=@i then 'Ontime'
                    when min(time(DateofCheckin)) between @i and @j then 'Late'
                    when min(time(DateofCheckin)) between @j and @n then 'HalfDay'
                    when DAYOFWEEK(Date(DateofCheckin)) =7 
                        and min(time(DateofCheckin)) >@j  then 'HalfDay'
                    else 'Absent' end as LoginStatus
      from CheckInLogs k Join
        where k.DateofCheckin='in'  and  
        DAYOFWEEK(Date(k.DateofCheckin)) != 1 and
        group BY date(k.DateofCheckin),k.EmpId) in
ON in.empid = out.empid
AND in.LogoutDate = out.LogoutDate

我还会考虑将case和group bys移到顶级查询。

mysql中的内连接逻辑

1 个答案: