1. ORA-12721 错误的含义 ORA-12721 错误表示在尝试执行 ALTER DATABASE CHARACTER SET 或相关字符集更改操作时,由于数据库中存在其他活动的会话(即其他用户或进程正在访问数据库),这些操作被阻止。这是因为更改字符集可能会影响正在进行的操作和数据完整性。 2. 可能导致 ORA-12721 错误的常见原因 其他用户会话:当...
ORA-12721 signaled during: alter database character set INTERNAL_CONVERT WE8ISO8859P15...Running the above sql statement from sql*plus fails with ORA-12721ChangesNoneCauseSign In To view full details, sign in with your My Oracle Support account. Register Don't have a My Oracle Support ...
AND error_code = 'ORA-12721' Database:12c Release 1 Error code:ORA-12721 Description:operation cannot execute when other sessions are active Cause:This command can only be run when there are no other sessions active Action:Ensure there are no other connections to the database Oracle Database ...
ORA-12721: operation cannot execute when other sessions are active.. Answer/guest Cause: This command can only be run when there are no other sessions active Action: Ensure there are no other connections to the database Please add more information about this Error ...