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Editorial Team
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Asked: 2026-05-22T02:15:27+00:00

I have a view that looks like this: package_id package_line status_a status_b 1 1

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I have a view that looks like this:

package_id  package_line  status_a        status_b
1           1             NOT_STARTED     FAILED
1           2             STARTED         STARTED
1           3             FAILED          NOT_STARTED
2           1             COMPLETE        STARTED
2           2             COMPLETE        NOT_STARTED

and so on, for several thousand rows. Status_a and status_b are separate unrelated statuses (in fact they are whether a package executed on system a and on system b).

I need a summary by package_id, to roll up to

   package_id status_a  status_b
   1          FAILED    FAILED
   2          COMPLETE  NOT_STARTED

The rules for combining package lines are

 1. If any package line has failed, the package has failed.
 2. If all package lines are complete, the package is complete.
 3. If all package lines are NOT_STARTED, the package has not started.
 4. Otherwise, the package is started (i.e. a combination of started, not_started, and complete would summarize as STARTED).

So I’m trying to come up with a query to create this summary. I’d love to post a code sample, but I’m really at loss. Presumably I want to GROUP_BY the package_id, but what can I use as an aggregate function that would allow me to apply the rules listed?

If it helps, I do have control over how the statuses are reported at the package line level, so I could report a numeric status (though I like having it human readable just for sanity).

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1 Answer

  1. Editorial Team

    Try this (same for status_b):

    SELECT package_id,
       CASE WHEN FAILED_COUNT > 0 THEN 'FAILED'
            WHEN COMPLETE_COUNT = ALL_COUNT THEN 'COMPLETE'
            WHEN NOT_STARTED_COUNT = ALL_COUNT THEN 'NOT_STARTED'
            ELSE 'STARTED'
       END status_a
FROM (            
SELECT package_id,
     COUNT(status_a) ALL_COUNT,
     SUM(CASE WHEN status_a = 'FAILED' THEN 1 ELSE 0 END) FAILED_COUNT,
     SUM(CASE WHEN status_a = 'COMPLETE' THEN 1 ELSE 0 END) COMPLETE_COUNT,
     SUM(CASE WHEN status_a = 'NOT_STARTED' THEN 1 ELSE 0 END) NOT_STARTED_COUNT,
     SUM(CASE WHEN status_a = 'STARTED' THEN 1 ELSE 0 END) STARTED_COUNT
 FROM table
GROUP BY package_id
)
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