Question

我有3个表：人，时间表和 timesheetTasks 。 Click to see the tables with data

我希望每个时间表都能获得总计工作，中断，生病和保留分钟。我能够得到分钟的总和，但只有每一个时间表（上面图像链接底部的快照）和以下SQL：

SELECT * FROM 
   (SELECT t.ROWID AS timesheetId, 
       SUM(ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0)) AS minsWorked 
    FROM timesheets t, timesheetTasks tt 
    WHERE t.ROWID = tt.timesheetId 
     AND (tt.taskType != "Break" AND tt.taskType != "Sick" AND tt.taskType != "Leave")),

   (SELECT SUM(ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0)) AS minsBreak 
    FROM timesheets t, timesheetTasks tt 
    WHERE t.ROWID = tt.timesheetId 
     AND (tt.taskType = "Break")),

   (SELECT SUM(ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0)) AS minsSick 
    FROM timesheets t, timesheetTasks tt 
    WHERE t.ROWID = tt.timesheetId 
     AND (tt.taskType = "Sick")),

   (SELECT SUM(ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0)) AS minsLeave 
    FROM timesheets t, timesheetTasks tt 
    WHERE t.ROWID = tt.timesheetId 
     AND (tt.taskType = "Leave"));

SQL小提琴：http://sqlfiddle.com/#!5/077cb/3

如何获取所有时间表的总中断，生病，离开和工作分钟？没有指定timesheetTasks的时间表需要每分钟列显示0（或null）。工作分钟的taskType不等于' Break '，' Sick '和' Leave '。

非常感谢您的帮助！我差不多2天一直在努力奋斗！

Answer 1

考虑条件聚合而不是多个子查询。要包含所有现有的时间表，请在时间表表中保留左连接，这将返回不匹配的NULL值。

SELECT ts.ROWID As timesheetId, 

       SUM(CASE WHEN (tt.taskType != "Break" AND tt.taskType != "Sick"
                      AND tt.taskType != "Leave")
                THEN ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0) 
                ELSE NULL
           END) AS minsWork,

       SUM(CASE WHEN tt.taskType = "Break"
                THEN ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0)
                ELSE NULL
           END) AS minsBreak,

       SUM(CASE WHEN tt.taskType = "Sick"
                THEN ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0) 
                ELSE NULL
           END) AS minsSick,

       SUM(CASE WHEN tt.taskType = "Leave"
                THEN ROUND(((julianday(tt.offTime) - julianday(tt.onTime))*1440),0) 
                ELSE NULL
           END) AS minsLeave

FROM timesheets ts 
LEFT JOIN timesheetTasks tt 
       ON ts.ROWID = tt.timesheetId
GROUP BY ts.ROWID

SQLFiddle

sqllite - 获取每个时间表的总分钟数

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