Oracle Database 21c （oracle-database-ee-21c-1.0-1.ol7.x86_64.rpm）文件分割成三个压缩包，必须集齐三个文件后才能一起解压一起使用：
Oracle Database 21c (oracle-database-ee-21c-1.0-1.ol7.part1)
https://download.csdn.net/download/weixin_43800734/85373867
Oracle Database 21c (oracle-database-ee-21c-1.0-1.ol7.part2)
https://download.csdn.net/download/weixin_43800734/85373869
Oracle Database 21c (oracle-database-ee-21c-1.0-1.ol7.part3)
https://download.csdn.net/download/weixin_43800734/85373763
