2017_MariaDB and MySQL Common Table Expressions.pdf

Inthesoftwareworld,therearestandardsandimplementationsofthosestandards.Sometimes,theimplementationscomefirst,featuresintroducedbyeagerdeveloperstryingtoadvancethestateoftheart,andtheyareformallystandardizedlater.Othertimes,thestandardcomesfirst,developedandagreeduponbyvendors,developer