SQL

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  • strict warning: Non-static method view::load() should not be called statically in /home/codecomp/public_html/codecompiling.net/mai.www/sites/all/modules/views/views.module on line 906.
  • strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/codecomp/public_html/codecompiling.net/mai.www/sites/all/modules/views/handlers/views_handler_filter.inc on line 607.
  • strict warning: Declaration of views_handler_filter::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /home/codecomp/public_html/codecompiling.net/mai.www/sites/all/modules/views/handlers/views_handler_filter.inc on line 607.
  • strict warning: Declaration of views_handler_filter_boolean_operator::value_validate() should be compatible with views_handler_filter::value_validate($form, &$form_state) in /home/codecomp/public_html/codecompiling.net/mai.www/sites/all/modules/views/handlers/views_handler_filter_boolean_operator.inc on line 159.
  • strict warning: Declaration of views_plugin_style_default::options() should be compatible with views_object::options() in /home/codecomp/public_html/codecompiling.net/mai.www/sites/all/modules/views/plugins/views_plugin_style_default.inc on line 24.
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How to emulate relational algebra division operator in SQL

DONE

I found this recently among my files while preparing a lecture on SQL for my Database Systems course. I wrote this on October 2010 and have not checked it since then, but I believe in the correctness of the information.

To my spanish readers, I ask for your forgiveness, I need to write a few things in english from time to time to avoid getting clogged (Is it "clogged" the right word?).


Ejercicios, Tutorial de MySQL / MySQL Ya

Tutorial interactivo de MySQL con ejercicios incluidos. Los ejercicios se pueden ejecutar en línea.

Ejercicios de SQL / Aulaclic

Curso de SQL con ejercicios, luego de una lectura rápida me parece bastante bueno, lástima que esté orientado a MS Access (si mal no recuerdo).

Citas...

Who wants to remember that escape-x-alt-control-left shift-b puts you into
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Discussion on the intuitiveness of commands, especially Emacs
via linux fortune

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