How to unlock the blocked account by oracle
(1) when we install Oracle, we have an administrative account in the last step, which can unlock the required account, but many people sometimes do not unlock it.
Let's take a look at how to unlock an account using the command line.
(2) start SQL Plus and log in to your SYSTEM account (the password is created when you install it yourself)
Then enter: alter user scott account unlock after the connection is successful
(3) at this time, the scott account has been unlocked successfully.
(4) try to log in.
Okay, the connection is successful!
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