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On data.stackexchange I am unable to get any results(rows) from following quries

select Top 10 * from Posts where OwnerDisplayName = 'Rodolphe';
select * from Posts where OwnerUserId=992165; // My user id
select * from Posts where OwnerUserId=603393; // Rodolphe id

The query which is giving results(rows)

select Top 10 * from Posts order by CreationDate desc;

But even the last query giving latest results of 2012-06-27 which is not understandable for me

Does data.stackexchange only show the posts or user of it and not the stackoverflow?

If thats the case how can i find the posts on stackoverflow of my specific interest

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Given that this is programming related, might this be better on SO proper, or are such questions fine here? –  Bart Aug 23 '12 at 9:59
@Bart: he just asked if he could ask this here, and the answer was positive. :-) –  Martijn Pieters Aug 23 '12 at 10:04
Hahaha, okay, I was unaware of that. And here I was tempted to vote to close... :) Top tip: don't listen to me. –  Bart Aug 23 '12 at 10:05
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1 Answer

up vote 2 down vote accepted

The data dump used for data.stackexchange.com is updated once every few months. The last update was on June 27th (as listed on the data-explorer homepage).

You were not active on Stack Overflow until July 16th, and thus don't have anything listed in the Posts table. You are listed in the Users table though.

Note that for me, the select * from Posts where OwnerUserId=603393 query does return results. The where OwnerDisplayName probably just times out, that column is not indexed (I suspect) and thus a complete table scan would be needed to find matching rows.

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"The data dump used for data.stackexchange.com only includes active users..." Citation? –  Time Traveling Bobby Aug 23 '12 at 10:20
@WaffelizedBobby: The OP has been a member of SO for 10 months but isn't in the data dump; his activity tab the user wasn't active until July. It's just a correlation of facts, no external references used. :-) In other words, I strongly suspect this is the case. –  Martijn Pieters Aug 23 '12 at 10:22
May be 603393 had not posted anything before 27th june, Otherwise i think its simple query, should give results. Thanks for the accurate/clear reasoning and answer. –  Sami Aug 23 '12 at 10:23
Interesting, I always assumed that everything gets dumped. –  Time Traveling Bobby Aug 23 '12 at 10:51
@WaffelizedBobby: Actually, my assumption was wrong. There were no posts for that user, but the user is present in the Users table. –  Martijn Pieters Aug 23 '12 at 10:55
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