ocacle下载地址：
https://www.oracle.com/database/technologies/、
ocacle19c版本下载地址
https://www.oracle.com/database/technologies/oracle-database-software-downloads.html#19c
选择See All（全部） 进入19c全部包下载地址
https://www.oracle.com/database/technologies/oracle19c-windows-downloads.html
server包下载
WINDOWS.X64_193000_examples.zip
cliet包下载
WINDOWS.X64_193000_client.zip
