psql 安装

https://www.postgresql.org/download/linux/redhat/

yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm

yum install -y postgresql12
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原文地址：https://www.cnblogs.com/chenzechao/p/12676586.html