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Showing posts with the label SQL

Oracle Database 12c: Statistics created as the data was loaded

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As you know, Oracle Magazine July/Aug 2015 issue released. You can free subscribe to Oracle Magazine digital edition and you can read here or you can read technical  articles here . I subscribed Oracle Magazine, in current issue have very interesting articles. One of interesting article of Oracle Expert Tomas Kyte (as known AskTom) with title: On Learning from Mistakes In this article Tom talks about Cost Based Optimizer and shown how optimizer learning from mistakes. I don't want review this article, but there have about interesting new feature of Oracle Database 12c.    Tom wrote: The fact that the NOW column of the query against USER_TABLES is the same as the LAST_ANALYZED column shows that statistics were created as the data was loaded—this is a new feature of Oracle Database 12c. Since Oracle Database 10g, the database has been computing statistics automatically for indexes when you create or rebuild them. With Oracle Database 12c, the database do...

Kitab incələmə: SQL asan yanaşma yolu (Genişləndirilmiş versiya)

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(blog post in Azerbaijani) TÉ™qdimat mÉ™rasimi AzÉ™rbaycan dilindÉ™ informasiya texnologiyaları movzusunda yazılmış kitab çox azdır. Bu tip kitabların az olmasının É™n böyük sÉ™bÉ™bi İT sahÉ™sinÉ™ aid rÉ™smi terminaloji tÉ™rcümÉ™nin olmamasıdır. Buna baxmayaraq son illÉ™rdÉ™ bir neçə texniki nəşrlÉ™ tanış olmaq imkanım olmuÅŸdur. Bu kitablardan biri Samir SÉ™mÉ™dov (OCM11g, www.ocm.az ) vÉ™ Ramin SÉ™mÉ™dov (OCP11g) qarÅŸlarının müəllifliyi ilÉ™ çap olunmuÅŸ “SQL asan yanaÅŸma yolu” kitabıdır. Bu günlÉ™rdÉ™ bu kitabın yeni bir versiyası, “SQL GeniÅŸlÉ™ndirilmiÅŸ versiya” kitabının İnfoCity vÉ™ Ali vÉ™ Nino maÄŸazalar ÅŸÉ™bÉ™kÉ™sininin dÉ™stÉ™yi ilÉ™ tÉ™qdimat mÉ™rasimi təşkil olunmuÅŸdu vÉ™ mÉ™n dÉ™ bu tÉ™dbirÉ™ dÉ™vÉ™t olunmuÅŸdum. Samir vÉ™ RaminÉ™ dÉ™vÉ™tÉ™ görÉ™ xüsusi təşəkkür edirÉ™m. TÉ™dbir hÉ™qiqÉ™tÉ™n gözÉ™l təşkil olunmuÅŸdu. SQL Asan yanaÅŸma yolu - GeniÅŸlÉ™ndirilmiÅŸ versiya: Bu kitabın birinci versiyası ilÉ™ dÉ™ tanış olmaq imkanım olmuÅŸdu. Kitabın ikinci versiyası mÉ™nÉ™ dÉ™ hÉ™diyyÉ™ olunduÄŸundan, oxumaq imkanım da oldu....

Overview Oracle SQL - MERGE Satement

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I showed with this video, overview Oracle Database SQL - MERGE Statement .I Created two table and transformed data from first table to second table with  MERGE Command.I think this video shall be interesting, who working with Oracle Database SQL and Data Warehousing.  See more : Oracle® Database SQL Language Reference 11g - MERGE

Oracle Administration - How to find which row in which datafile?

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