Data block
Do we have any kind of place where you can get data block to the practice. The data must match to a kind of schema object relationship. In bulk means that the number of rows should be in crores. Closely on explain plans with data block.Random data only get you so far. It is very well for certain types of trials in bulk, but it has two major flaws:
(1) a lot of performance issues come from tilt in our data. Random generatedly values, while presenting tufts of values is wanted to have the extremes of the distribution of the data that we see in actual data. This includes things like the change in length of string.
(2) key generation are difficult. Of course, we can generate unique digital keys with ROWNUM but other types or uniqueness are harder and the hassles of foreign key relationships is a complete hemorrhoid.
So, what to do? Well, there are a number of specific data. The best place to look is [url http://www.infochimps.com/datasets] InfoChimps. This used to be a really great site but the company (not without reason) is looking to make money from their efforts, so they now limit access to a large number of their data sets. However several games is free (although reigistration is necessary) or even some links to hosted public data sets.
Most of the data sets are CSVs, so there is a certain amount of work needed to bring them into a database. However, it is not too difficult with the external tables, and it is also a useful training full-time.
Cheers, APC
Tags: Database
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Message relates to: Centro (Verizon)
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Hello
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Hello
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Hello
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Published by: Laus on June 3, 2013 04:16Oracle block. The doc for dbms_rowid makes this clear, http://docs.oracle.com/cd/E11882_01/appdev.112/e25788/d_rowid.htm#CIHDGIGD
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Hi all
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startup nomount
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Edited by: KinsaKaUy? on July 18, 2012 20:19KinsaKaUy? wrote:
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Kind regards
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