mysql - Why is a "GRANT USAGE" created the first time I grant a user privileges? -

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I'm new to the admin side of DBMS and tonight I was using a new database (MySQL) when I saw . After giving the user privilege for the first time, another grant has been made, which is <*> on * GRANT USAGE. * Password is user-recognized by password

Documentation says that USAGE is the privilege "has no privilege," so I tell that sequential As indexes work, and probably the user will have any kind of privilege for all databases, so does it work as a grip?

I also do not understand that this line has a recognized section, when the grant made by me is not (mostly because I do not understand this Now that is identified

edit: Sorry for not being told basically, grant 

  database Allow all authority over. * Allow, Submit, Update, Delete on Database for Admin_user For the user,

As you said, MySQL USAGE

The USAGE privilege specifier has" no privilege. "It is used globally to affect current account privileges Account attributes, such as resource limits or SLL attributes, can be modified.

USAGE There is a way that tells MySQL that an account is present without any real privilege for that account, they have only use MySQL, therefore USAGE is allowed It corresponds to a line with any specialty set in the `mysql`.user` table.

The section that indicates that a password is set for that user, how do we know who the user says they are? Identify by sending the correct password for their account.

A user's password is one of the global level account features that are not connected to a particular database or table. It also resides in the `mysql`.user` table. If the user does not have any other privileges then ON *. * , call them USAGE ON *. * is given and their password hash appears there. This is often a side effect of the CREATE USER statement when a user is created in this way, they do not initially get any privileges, so they are only USAGE .


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