标题: ORA-31670: Username argument must be specified [打印本页] 作者: admin 时间: 2016-9-6 20:51 标题: ORA-31670: Username argument must be specified ORA-31670: Username argument must be specified and non-null. Cause: Called change userwith a NULL username or a null string. Action: Specify a validusername argument. If this error occurs from a Data Pump
client (e.g. expdp or impdp), try the operation again. If the error occursagain,
contact Oracle Customer Support and report the error.