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Is there any site where I can get good database with practice queries to solve. I am seeing a lot on internet, but mostly looks like beginner level.
Check out SQL Zoo: http://sqlzoo.net/
See http://www.w3schools.com/sql/default.asp ... I first started with that then I made up a database with 5 or 6 tables and tried myself subqueries and so on...
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I was wondering how MySQL (and other databases for that matter) work under the hood. Do they use standard C I/O calls like fseek to find a record?
Here is the link to the source code. From a quick review of the file I can confirm that there are multiple check that is been done before and after an insert. It's actually a great idea to review the whole file very interesting.
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I need a online website to test MySQL statements (some sort of sandbox). Bonus points if you can store code and share it with other people. Something similar to jsfiddle.net for JavaScript. It allows code testing in a safe secure environment.
Theres an sql formatting tool that also reports syntax errors:
http://www.dpriver.com/pp/sqlformat.htm
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at the moment I'm writing a paper and I need some input about the state of the art of selhealing and selfprotection in DBMSs. Does somebody read some interesting articles or books about this topics in the last few month? Doesnt matter which DBMS you have read about.
Regards
Perhaps this: Automatic Page Repair During a Database Mirroring Session.
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I am looking for a tool that will help me analyze my slow queries log of MySql, any suggestions?
Did you try mysqldumpslow, part of MySQL?
http://dev.mysql.com/doc/refman/5.1/en/mysqldumpslow.html
I like this Ruby gem: https://github.com/wvanbergen/request-log-analyzer
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I am using the Business Objects Data Integrator tool and I want to run it from the command line so I can setup some automated unit testing.
Does anyone know if there is a command line to run it?
From
http://help.sap.com/businessobject/product_guides/xir2acc/en/DIAdministratorGuide.pdf
Perhaps pp65-66 are what you want? I confess to never having tried it myself, but it looks like it should work. :)