每月 Oracle 停机时间（以分钟为单位）

Question

这是用Oracle 11g或12c写的...

您好，

我试图将此数据整理成过去 12 个月的停机时间，以这种方式整理以支持图表。

在下面的 Oracle SQL 查询中，注释查询 "M" 显示了如何每月输入一条记录。查询 "M" 显示了我需要的最终形状，除了我需要将停机时间分钟数放入每个月度箱中。

然而，数据是由查询 "D" 提供的，我为了这个例子而模拟了它。当然，更好的示例可能会显示更多的边缘情况，例如跨越一个月的第一天等。但是这个示例就足够了。

WITH 
/*
  M AS (  
    SELECT ADD_MONTHS (TRUNC (SYSDATE, 'MONTH'), -1 * LEVEL) AS MO
    , 0 AS DOWNTIME FROM DUAL
     CONNECT BY LEVEL <= 12),
*/
D AS (  -- data simulating a downtime day
     SELECT 'Target Up' AS AVAILABILITY_STATUS,
            TO_DATE ('9/25/2015 15:12:47', 'MM/DD/YYYY HH24:MI:SS')
               AS SINCE,
            385392 AS MINUTES
       FROM DUAL
     UNION ALL
     SELECT 'Target Down' AS AVAILABILITY_STATUS,
            TO_DATE ('11/25/2015 15:12:00', 'MM/DD/YYYY HH24:MI:SS')
               AS SINCE,
            1440 AS MINUTES
       FROM DUAL
     UNION ALL
     SELECT 'Target Up' AS AVAILABILITY_STATUS,
            TO_DATE ('11/26/2015 15:12:00', 'MM/DD/YYYY HH24:MI:SS')
               AS SINCE,
            200122 AS MINUTES
       FROM DUAL)
SELECT *
FROM D
   PIVOT
      (SUM (MINUTES)
      AS TIME
      FOR AVAILABILITY_STATUS
      IN ('Target Up' AS UP,
         'Target Down' AS DOWN,
         'Blackout' AS BLACKOUT));

现在的结果是这样的：

SINCE                  UP_TIME          DOWN_TIME   BLACKOUT_TIME                          
 9/25/2015 3:12:47 PM   385,392 
11/25/2015 3:12:00 PM                   1,440 
11/26/2015 3:12:00 PM   200,122

但我需要它看起来像这样：

MO         DOWN_MINUTES
 3/1/2016     0
 2/1/2016     0
 1/1/2016     0
12/1/2015     0
11/1/2015  1440
10/1/2015     0
 9/1/2015     0
 8/1/2015     0
 7/1/2015     0
 6/1/2015     0
 5/1/2015     0
 4/1/2015     0

P.S.:为了组的利益，查询"M"中的实际宕机是由以下查询生成的，从Oracle读取企业经理：

WITH X
 AS (SELECT START_TIMESTAMP,
            NVL (END_TIMESTAMP, SYSDATE) AS END_TIMESTAMP,
            AVAILABILITY_STATUS,
            TRUNC (
               (NVL (END_TIMESTAMP, SYSDATE) - START_TIMESTAMP) * 24 * 60)
               MINUTES
       FROM MGMT$AVAILABILITY_HISTORY
      WHERE     AVAILABILITY_STATUS IN
                   ('Target Down', 'Target Up', 'Blackout')
  )
  SELECT AVAILABILITY_STATUS,
     MIN (START_TIMESTAMP) AS SINCE,
     SUM (MINUTES) AS MINUTES
  FROM X
GROUP BY AVAILABILITY_STATUS
ORDER BY MIN (START_TIMESTAMP);

提前谢谢你。我已经为此苦苦思索了好几天，是时候寻求帮助了。

Answer 1

试试这个：

WITH 
M AS (  
    SELECT ADD_MONTHS (TRUNC (SYSDATE, 'MONTH'), -1 * LEVEL) AS MO
    , 0 AS DOWNTIME FROM DUAL
    CONNECT BY LEVEL <= 12),

D AS (  -- data simulating a downtime day
     SELECT 'Target Up' AS AVAILABILITY_STATUS,
            TO_DATE ('9/25/2015 15:12:47', 'MM/DD/YYYY HH24:MI:SS')
               AS SINCE,
            385392 AS MINUTES
       FROM DUAL
     UNION ALL
     SELECT 'Target Down' AS AVAILABILITY_STATUS,
            TO_DATE ('11/25/2015 15:12:00', 'MM/DD/YYYY HH24:MI:SS')
               AS SINCE,
            1440 AS MINUTES
       FROM DUAL
     UNION ALL
     SELECT 'Target Up' AS AVAILABILITY_STATUS,
            TO_DATE ('11/26/2015 15:12:00', 'MM/DD/YYYY HH24:MI:SS')
               AS SINCE,
            200122 AS MINUTES
       FROM DUAL)
SELECT M.mo, Nvl(s, 0) AS minutes
FROM M
     LEFT JOIN (  SELECT TRUNC (SINCE, 'MONTH') AS D, SUM (MINUTES) AS S
                    FROM D
                   WHERE AVAILABILITY_STATUS = 'Target Down'
                GROUP BY TRUNC (SINCE, 'MONTH')) GR
        ON GR.D = M.MO
ORDER BY 1;

每月 Oracle 停机时间（以分钟为单位）

Oracle downtime in minutes per month

sql

oracle

date-math

oracle11g

oracle12c