oracle“ORA-12514, TNS:listener does not currently know of service requested in connect descriptor”

先使用这个里边的步骤https://www.cnblogs.com/kerrycode/p/6698791.html
碰到ORA-01034: ORACLE not available ORA-27101这个错误
使用这个里边的步骤https://jingyan.baidu.com/article/5552ef47c73eef518ffbc908.html
碰到ora-01031:insufficient privileges
使用这个里边的步骤https://blog.csdn.net/hizzyzzh/article/details/52244155

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