Need to update rows from a stored procedure via IDs in a temp table

Question

I\'m trying to take rows in a table describing outages and break them, via a calculated time range, into separate rows to be inserted into another table to describe hour by hour

Answer 1

First, some set up:

USE tempdb;
GO

CREATE TABLE dbo.Outages
(
    OutageDate DATE,
    StartTime TIME(7),
    EndTime TIME(7),
    Duration INT
);

INSERT dbo.Outages SELECT '20101110', '16:00', '17:30', 90;
/*
-- I also tested these cases, and *think* it still produces what you expect:
INSERT dbo.Outages SELECT '20101111', '13:00', '14:02', 62;
INSERT dbo.Outages SELECT '20101112', '17:00', '18:00', 60;
INSERT dbo.Outages SELECT '20101113', '16:05', '16:25', 20;
INSERT dbo.Outages SELECT '20101114', '16:59', '18:01', 62;
INSERT dbo.Outages SELECT '20101115', '22:15', '01:30', 165;
*/

Now, the query:

;WITH n(n) AS 
(
  SELECT TOP 24 ROW_NUMBER() OVER (ORDER BY [object_id])
  FROM sys.objects
),
x AS
(
  SELECT 
    o.OutageDate, StartHour = (DATEPART(HOUR, StartTime) + n.n - 1) % 24,
    StartTime, EndTime, Duration,
    rn = ROW_NUMBER() OVER (PARTITION BY o.OutageDate, o.StartTime ORDER BY n.n)
  FROM n INNER JOIN dbo.Outages AS o
  ON n.n <= CEILING(DATEDIFF(MINUTE, CONVERT(DATETIME, StartTime), 
    DATEADD(DAY, CASE WHEN EndTime < StartTime THEN 1 ELSE 0 END, 
    CONVERT(DATETIME, EndTime)))/60.0)
 ),
 mx AS (SELECT OutageDate, StartTime, minrn = MIN(rn), maxrn = MAX(rn) 
   FROM x GROUP BY OutageDate, StartTime)

 -- insert into some other table
 SELECT 
    x.OutageDate, 
    x.StartHour, 
    StartMinutes = CASE 
      WHEN x.rn = mx.minrn THEN DATEPART(MINUTE, x.StartTime) ELSE 0 END,
    EndHour = x.StartHour + 1, 
    EndMinutes = CASE
      WHEN x.rn = mx.maxrn THEN DATEPART(MINUTE, x.EndTime) ELSE 0 END,
    x.StartTime, 
    x.EndTime,
    x.Duration
 FROM x INNER JOIN mx 
 ON x.OutageDate = mx.OutageDate
 AND x.StartTime = mx.StartTime
 ORDER BY x.OutageDate, x.rn;
GO

When you're happy that it is giving you the right rows for the various scenarios, then replace

-- insert into some other table

With an actual insert, e.g.

INSERT dbo.OtherTable(col1, col2, ...)

If you're trying to create a brand new table from this output, then replace

FROM x INNER JOIN mx

With an INTO clause, e.g.

INTO dbo.MyNewTable FROM x INNER JOIN mx

Don't forget to clean up:

DROP TABLE dbo.Outages;