Multiple records data in same row.

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I have requirement as follows .

Id     createddt createdby   modifideby modifydt

1      21/2/2015    2         NULL       NULL
1      NULL         NULL       4        22/2/2015
2      22/2/2015     3         NULL      NULL
2      NULL         NUll       3         23/2/2015
1      NULL         NULL       5         27/2/2015

I need As follows :

Id     createddt createdby   modifideby modifydt

1      21/2/2015    2          5         27/2/2015
2      22/2/2015     3         3         23/2/2015

I need created date and last modified date in one row ......

Posted 3-Jun-15 4:15am

Joemens

Updated 3-Jun-15 4:41am

CHill60

v2

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JJMatthews 3-Jun-15 10:27am

I am far from a database expert but I had the same problem to solve last year (if I understand correctly). I ended up using a "left outer join" to get the correct results.

CHill60 3-Jun-15 10:44am

What have you tried?

3 solutions

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Peter Leow · Answer 1 · 2015-06-03T04:57:00

Solution 2

Use max and min should do the trick:

SQL

select id, min(createddt), max(createdby), max(modifideby), max(modifydt) from tablename
group by id

Posted 3-Jun-15 4:57am

Peter Leow

Comments

CHill60 3-Jun-15 10:59am

Apologies for the overlap - system is running slow

Peter Leow 3-Jun-15 11:03am

Yes, it is happening intermittently.

Maciej Los 3-Jun-15 11:05am

+5!

CHill60 · Answer 2 · 2015-06-03T04:58:00

In it's simplest terms you can just do

SQL

select Id, max(createddt), max(createdby), max(modifideby), max(modifydt)
from tablename
group by Id

which will give you the results you expect. Note that MAX[^] ignores NULL values.

I suspect there is more to your requirement however - is your course work to do with PIVOT? If so then read this article Simple Way To Use Pivot In SQL Query[^]

Maciej Los · Answer 3 · 2015-06-03T04:48:00

Solution 1

Try this:

SQL

SELECT t1.Id, t1.createddt, t1.createdby, t2.modifiedby, t2.modifydt
FROM TableName AS t1 INNER JOIN 
     (
         SELECT Id, MAX(modifydt) AS modifydt
         FROM TableName 
         GROUP BY Id
     ) AS t2 ON t1.Id = t2.Id AND t1.modifydt = t2.modifydt

Posted 3-Jun-15 4:48am

Maciej Los

Comments

CHill60 3-Jun-15 10:59am

Apologies for the overlap - system is running slow

Maciej Los 3-Jun-15 11:05am

No problem ;)

Multiple records data in same row.

3 solutions

Solution 2

Solution 3

Solution 1

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