ORA-28000: the account is locked Login to SQL Plus client on the oracle database machine. enter user-name: system enter password: password [Only if, if you have not changed your default password while DB installation default password blank or SYSTEM] Press enter. after which, you will be seeing the connection status. Now, SQL > ALTER USER [USER_NAME] ACCOUNT UNLOCK; Press enter. you will be seeing message: user altered. Now try login with the user name on db client[sqldeveloper/dbeaver].
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