A tutorial for Zeos 7.3 with Lazarus 2.0.4 and Firebird 4 Beta1 is ready for Download.
The documentation in source is German and English. The description is now in German, a description in English will come in November. The tutorial shows how to create a database , it's tables, indexes, foreign key and automatic increment fields supported by trigger. After this you can test to work with some SQL statements und how to link tables, makes SQL queries editable and more Hope it will be helpfull for beginners and experienced people also.
Tutorial description start in German:
https://lazarus.intern.es/tutorial_firebird_lazarus_zeos_2.html
Tutorial description start in English (come November 19):
https://lazarus.intern.ws/tutorial_firebird_lazarus_zeos_2.html
Download, take tutorial 2:
https://lazarus.intern.es/download_tutorials_lazarus_zeos_firebird.html