用Navicat连接Oracle数据库时报错ORA-28547:connection to server failed,probable Oracle Net admin error
1、到下面网址下载OCI
https://www.oracle.com/database/technologies/instant-client/downloads.html
2、导入下载文件解压缩后的oci.dll
3、重启Navicat
Navicat oracle ORA-28547:connection to server failed
原文：https://www.cnblogs.com/ttrrpp/p/14366460.html