• Fixed en dash.

• Fixed typo.

• Fixed typo.

• Fixed some minor inconsistencies.

• Fixed typo.

• Ignored submitted paper.

• Anonymised country and institution.

• Switched to anonymous review mode.

• Final proof-read.

• Added some missing SQL learning systems.

• Rewrote literature review.

• Added grade distribution comparisons.

• Changed code listing to a figure. ...

• Fixed position of table captions.

• Second proof-reading pass. ...

• Rewrote test execution description.
• Added summary to evaluation section.
• Restructured issues discussion.

• Rephrased first paragraph of literature review.

• Added results of database complexity metrics.

• First proof-reading pass. ...

• Added another confounding factor.
• More consistent use of “behaviour”.
• Added two-way flows to architecture diagram.
• Expanded on DBMS-independence.
• Cleaned up integrity testing.
• Expanded on use of unit testing.
• Added note about grouping tests.
• Clarified teacher grading process.
• Rewrote several parts of evaluation section.
• Rewrote marks & feedback generation in issues section.

• Ignored ACM documentation.

• Added GPA data. ...

• Ignored raw data directory.

• Tweaked format of Ambler 2006. ...

• Moved version number in Apache 2017 (CQL).

• Wrote abstract. ...

• Switched code to listings and reformatted.
• Rearranged positions of some figures.

• Tweaked title slightly. ...

• Added a bunch of ACM boilerplate.
• Added CCS concepts  and keywords.
• Expanded a missing list of citations.

• American spell-checked. ...

• A bunch of minor tweaks in lots of places.
• Added missing description of how the tests actually work (e.g., metadata querying) in design section.
• Emphasised novelty more.
• “Behavioural” tests → “integrity” tests.
• Added teaching experience to evaluation.
• Wrote issues & future work section.
• Wrote conclusion.

• Added another confounding factor and supporting GPA data. ...

• Added new discussion section.
• Added notes to data table.

• Rewrote the motivation section a bit more. ...

• Removed all sub-section headings.
• Rewrote system design section.
• Added description of how tests are run and the ability to add custom table properties.
• Rewrote evaluation section, and added dsicussion of confounding factors.

• Added data files for database complexity metrics, and student marks data.

• Added some references to database schema complexity metrics.

• Added a bunch of statistical analysis.

• Added raw data for assignment marks.

• Added section on test specification. ...

• Updated sections on different operation modes and rearranged figures.
• Added more notes on evaluation and known issues.
• Other minor changes.