|BlocklySQL - Visual SQL Programming|
|Written by Nikos Vaggalis|
|Thursday, 14 January 2021|
BlocklySQL is a block-based, visual programming tool like Scratch but for SQL. It is the outcome of academic research at the University of Würzburg on the kind of errors that students who are novice in writing SQL queries make.
The research has shown that the top three errors are: wrong syntax (21%), undefned column name (13%), and wrong use of GROUP BY-clause(10%), mostly syntactic errors.Thus the idea was that a block-based editor that would eliminate such errors would make learning SQL easier.
While there are already some similar tools, BlocklySQL comes with two extra advantages; it is open source and free and it can be customized with blocks being added or subtracted to match the a given domain. For example, the live demo is written to accommodate the MySQL sample database classicmodels, a retailer of scale models of classic cars database which contains typical business data such as customers, products, sales orders, sales order line items, etc.
There is also another demo run against the daily updated weather and football database dbup2date, unfortunately the link no longer works.
Before you try it out you have to know its limitations first. Currently only SELECT statements are supported and further
The advantage is that while student use blocks to enter SQL, they can then see, and also export, the auto-generated SQL in order to learn the actual syntax.
The project is available on GitHub.
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|Last Updated ( Thursday, 14 January 2021 )|