查看oracle当前库的模式
SQL>startupnomount;SQL>selectopen_modefromv$database;
报错:ORA-01507:databasenotmounted
由于只启动到nomount,所以会报上面的错误
SQL>alterdatabasemount;
SQL>selectopen_modefromv$database;
OPEN_MODE
----------
MOUNTED
SQL>alterdatabaseopen;
SQL>selectopen_modefromv$database;
OPEN_MODE
----------
READWRITE
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