An opensource web-based Visual Query Designer for MySQL, web-vqd.
Let’s you build SQL SELECT queries. Create JOINs by drag-n-dropping column names.
Git repo : GitHub - swapnilmj/web-vqd: A Web-based Visual Query Designer for Mysql.
Screencast:
Demo (adapted for static site):
http://www.swapniljoshi.xyz/web-vqd/