GNU Sqltutora web based interactive tutorial of Structured Query Language (SQL)

Aleš Cepek and Jan Pytel

Faculty of Civil Engineering, Czech Technical University in PragueDepartment of Mapping and Cartography

26–28 February, 2009

The FIG Commission 2 and the Austrian Society for Surveying and Geoinformation (OVG) Workshop Navigating the Future of Surveying Educationat Federal Office of Metrology and Surveying (BEV), Vienna, Austria

Aleš Cepek and Jan Pytel ( Faculty of Civil Engineering, Czech Technical University in Prague Department of Mapping and Cartography )GNU Sqltutor 26–28 February, 2009 1 / 24

Contents

1 Introduction

2 Examples

3 Evaluation

4 Strategy for random question selection

5 TODO List

Aleš Cepek and Jan Pytel ( Faculty of Civil Engineering, Czech Technical University in Prague Department of Mapping and Cartography )GNU Sqltutor 26–28 February, 2009 2 / 24

Introduction

SQLtutor is an interactive online web based tool for teaching and examiningstudents’ knowledge of SQL

introduction of new study branch geoinformaticsintroduction to relational databases and SQL languagebackground for spatial queries in GIS and other subjectsPostgreSQL selected as a main RDBMS in our curricula

Structured Query Language (SQL)relatively simple language (at least on the basic level)no need of previous background and knowledge of DBideal candidate for computer based learning

SQLtutor — an web based interactive tutorialproject started in August 2007presented on a faculty seminarfirst experimental course with master degree. studentsofficial status of GNU software in January 2009

Aleš Cepek and Jan Pytel ( Faculty of Civil Engineering, Czech Technical University in Prague Department of Mapping and Cartography )GNU Sqltutor 26–28 February, 2009 3 / 24

GNU Sqltutor

home page http://www.gnu.org/software/sqltutorCVS repository http://savannah.gnu.org/projects/sqltutorSqltutor online http://sqltutor.fsv.cvut.cz

License GNU General Public License v3 or laterSqltutor manual available online in several formats (HTML, ASCII, Info, dvi,

PostScript, PDF)

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Opening Dialog Page

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Online Manual

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Tutorial Datasets

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Running a Tutorial

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Table Data (part 1)

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Table Data (part 2)

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A First Try

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A Better Guess

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A Correct Answer

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Setting Help in Opening Page

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Help Button

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More Examples

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More Examples

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More Examples

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Closing the Test

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Final Score

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Evaluation

evaluation =

⌊( ∑correct ansvers

points

)× number of correct answers

number of all questions asked

⌋

evaluation grade90 A75 B60 C45 D30 E

less than 30 F

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Distribution of Questions by Points

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TO-DO list

some formal adjustments of source codes to be fully compliant with GNUcoding standardspossible redesign of the Sqltutor database schema to have better supportfor multilingual tutorialbuild a large and reliable English tutorial SQL with datasets that can begenerally understood even outside the English speaking countriesanalyze the new algorithm for random selection of questions, implementa better strategy if needed,possible new parameters for final evaluationa tutorial for PostGIS spatial enhancement of PostgreSQL database

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Thank you for your attention

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