Question

我使用的代码根据where子句中的日期为我提供了正确的信息。我想在其他日期获得相同的信息。所以现在我必须自己更改日期并运行代码，将其复制/粘贴到其他地方，然后重新开始使用新的日期。如果我想要一年中每一天的信息，那需要做很多工作。是否可以自动更改where子句中的日期以及最佳或最简单的方法？

Select t4.Count, t4.Status
From(
    SELECT count(l.VoerID) as Count, l.Datum, l.Status, l.LogID
      FROM (
             SELECT k.VoerID, k.Datum, MAX(k.LogID) AS LogID
               FROM DB.LogStatus k
                Where Datum < '2013-07-01'
              GROUP BY k.VoerID
           ) m
      JOIN DB.LogStatus l
        ON l.VoerID = m.VoerID AND l.LogID = m.LogID
    Where status in ('B','IN1','IN2''V','Reserv')
    Group by Status
)t4

编辑：

原始表格（在一个VoerID上选择）（表由数千个VoerID组成）

LogID基准用户ID状态时间VoerID

1299772 2013-04-17 259 N 14:09:11 50174

1319774 2013-05-23 68 B 11:19:17 50174

1320038 2013-05-23 197 IN1 16:53:30 50174

1322002 2013-05-28 68 IN2 09:22:32 50174

1325052 2013-05-31 161 G 09:00:59 50174

1325166 2013-05-31 10 400 09:15:12 50174

1325182 2013-05-31 10 V 09:30:07 50174

1325208 2013-05-31 10 V 09:45:06 50174

1325406 2013-05-31 10 Reserv 11:45:06 50174

1325522 2013-05-31 10 Reserv 12:15:06 50174

1325954 2013-05-31 10 Reserv 15:15:13 50174

1328474 2013-06-05 10 Reserv 13:15:06 50174

1329230 2013-06-06 10 Reserv 09:45:03 50174

1329244 2013-06-06 10已存档10:00:08 50174

1329268 2013-06-06 10存档10:15:08 50174

1330286 2013-06-07 10存档10:15:06 50174

我现在想知道几个月前VoerID的状态是什么。所以在2013-05-01 status = N，在2013-06-01 status = Reserv，从2013-07-01它是Archived。

所以上面是一个VoerID。我想计算下个月的第一个LOGID和每个状态的每个月的VoerID数量

最后，如果我得到的信息，我想在MSExcel中将其编辑为crosstable和Chart：

1-1-2013 1-2-2013 1-3-2013 1-4-2013 1-5-2013

N 20 22 24 26 28

B 23 21,5 20 18,5 17

IN1 12 15 18 21 24

IN2 15 7 14 18 25

V 800 1000 1200 1400 1600

Reserv 50 63 76 89 102

存档100000 101220 102440 103660 104880

Answer 1

进行一年中所有日子的交叉连接，然后按当天分组。

这样的事情： -

SELECT COUNT(l.VoerID) as COUNT, m.aDate, l.Status
FROM 
(
    SELECT Sub1.aDate, k.VoerID, MAX(k.LogID) AS LogID
    FROM DB.LogStatus k
    CROSS JOIN 
    (
        SELECT DATE_ADD('2013-01-01', INTERVAL units.i + tens.i * 10 + hundreds.i * 100 DAY) AS aDate -- return the first day of the year + all the numbers from 0 to 999
        FROM (SELECT 0 AS i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) units -- Select units of days
        CROSS JOIN (SELECT 0 AS i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) tens -- select tens
        CROSS JOIN (SELECT 0 AS i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) hundreds -- select hundreds
        WHERE  DATE_ADD('2013-01-01', INTERVAL units.i + tens.i * 10 + hundreds.i * 100 DAY) <= '2013-12-31' -- limit the dates to the days of the specific year
    ) Sub1
    WHERE k.Datum < Sub1.aDate -- This should give up multiple copies of record, one for each date where the d Datum is less that that date
    GROUP BY Sub1.aDate, k.VoerID -- GRoup by date and id, so getting the max log id for each date and id
) m
JOIN DB.LogStatus l
ON l.VoerID = m.VoerID AND l.LogID = m.LogID -- Join where log it is the max log id
WHERE status in ('x','y','z')
GROUP BY m.aDate, Status

编辑 - 或每个月： -

SELECT COUNT(l.VoerID) as COUNT, m.aDate, l.Status
FROM 
(
    SELECT Sub1.aDate, k.VoerID, MAX(k.LogID) AS LogID
    FROM DB.LogStatus k
    CROSS JOIN 
    (
        SELECT DATE_ADD('2013-01-01', INTERVAL units.i MONTH) AS aDate -- return the first day of each month of the year
        FROM (SELECT 0 AS i UNION SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10 UNION SELECT 11) units -- Select units of days
    ) Sub1
    WHERE k.Datum < Sub1.aDate -- This should give up multiple copies of record, one for each date where the d Datum is less that that date
    GROUP BY Sub1.aDate, k.VoerID -- GRoup by date and id, so getting the max log id for each date and id
) m
JOIN DB.LogStatus l
ON l.VoerID = m.VoerID AND l.LogID = m.LogID -- Join where log it is the max log id
WHERE status in ('x','y','z')
GROUP BY m.aDate, Status

自动更改where子句中的变量

1 个答案: