2. Compared Version MySQL PostgreSQL root@localhost [mysql]> select @@version,now(); +-----------+---------------------+ | @@version | now() | +-----------+---------------------+ | 8.0.19 | 2020-05-01 22:57:16 | +-----------+---------------------+ 1 row in set (0.00 sec) postgres=# select version(),now(); PostgreSQL 12.2 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-3