SQL LEARN https://github.com/mwenge/dirtylittlesql.com https://github.com/ben-n93/SQL-tips-and-tricks SCALING https://github.com/dbgate/dbgate https://github.com/readysettech/readyset https://github.com/jeremydaly/serverless-mysql TOOLS https://github.com/chartdb/chartdb https://github.com/rickbergfalk/postgrator https://thdoan.github.io/mr-data-converter/ https://sqlizer.io/#/ ERRORS https://www.percona.com/blog/2019/05/13/solve-query-failures-regarding-only_full_group_by-sql-mode/