Oracle数据库连接失败，求怎么解决？？？报错如下，谢谢
状态: 失败 -测试失败: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
mzx15069787571
2017/08/09 03:52- oracle
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状态: 失败 -测试失败: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor