oracle中selectstatusfromv可以这么考虑!查询当前实例的状态，v$instance是个视图STATUSVARCHAR2(12)Statusoftheinstance:•STARTED-AfterSTARTUPNOMOUNT•MOUNTED-AfterSTARTUPMOUNTorALTERDATABASECLOSE•OPEN-AfterSTARTUPorALTERDATABASEOPEN•OPENMIGRATE-AfterALTERDATABASEOPEN{UPGRADE|DOWNGRADE}