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rows become columns

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Topic

ptah
Starting Member

3 Posts

Posted - 2007-01-18 : 08:05:17

hello all,
i am trying to create a view from a table that will keep track of the time between each stage of tasks given. take a look at the data below:

progressID taskID stage status theDate
------------------------------------------------------------------------
1407525 1091657 In Progress Logged 2006-11-16 10:00:24.000
1407526 1091657 In Progress Inprogress 2006-11-16 12:08:59.036
1407214 1091657 In Progress Resolved 2006-11-16 14:15:48.000
1407220 1091657 Closed Solved 2006-11-16 14:36:05.000

i would like to be able to have just one row per task ID showing the difference between the stages, as shown below . only the 2nd column is a date, the rest are are hours (datediff) between the stage and its preceeding stage :

taskID Logged InProgress Resolved Solved
1091657 2006-11-16 10:00:24.000 2.08 2.07 0.21

is it possible to achieve such a transformation using views and a number of select statements (i.e no dts)? all assistance will be highly appreciated.

regards,

ptah

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2007-01-18 : 08:23:44

[code]SELECT TaskID,
Logged,
CAST(DATEDIFF(minute, Logged, InProgress) / 60.0 AS NUMERIC(9, 2)) AS InProgress,
CAST(DATEDIFF(minute, InProgress, Resolved) / 60.0 AS NUMERIC(9, 2)) AS Resolved,
CAST(DATEDIFF(minute, Resolved, Solved) / 60.0 AS NUMERIC(9, 2)) AS Solved
FROM (
SELECT TaskID,
MAX(CASE WHEN Status = 'Logged' THEN theDate END) AS Logged,
MAX(CASE WHEN Status = 'InProgress' THEN theDate END) AS InProgress,
MAX(CASE WHEN Status = 'Resolved' THEN theDate END) AS Resolved,
MAX(CASE WHEN Status = 'Solved' THEN theDate END) AS Solved
FROM YourTableNameHere
GROUP BY TaskID
) AS d
ORDER BY TaskID[/code]
Peter Larsson
Helsingborg, Sweden

ptah
Starting Member

3 Posts

Posted - 2007-01-18 : 10:59:14

thanks for the help. much appreciated.

ptah

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