Now emojis are supported! :white_check_mark:
/ :heavy_check_mark:
gives a good impression and is widely supported:
Function | MySQL / MariaDB | PostgreSQL | SQLite
:------------ | :-------------| :-------------| :-------------
substr | :heavy_check_mark: | :white_check_mark: | :heavy_check_mark:
renders to (here on older chromium 65.0.3x) :