Updates the configuration of the specified user. For more information, see Managing users.
Users can modify most of their own account settings without requiring RBAC permissions, except when altering LOGIN configurations or a SERVICE ACCOUNT.

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ALTER USER SET

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Syntax

ALTER USER <user_name> SET
	[ LOGIN = <login_name> | DEFAULT ]
        [ SERVICE_ACCOUNT = <service_account_name> | DEFAULT ]
        [ DEFAULT_DATABASE = <database_name> | DEFAULT ]
	[ DEFAULT_ENGINE = <engine_name> | DEFAULT ];
or 
ALTER USER <user_name> RENAME TO <new_user_name>;

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Parameters

ParameterDescription
<user_name>The name of the user, may contain non-alpha-numeric characters such as exclamation points (!), percent signs (%), dots (.), underscores (_), dashes (-), and asterisks (*). Strings containing non-alphanumeric characters must be enclosed in single or double quotes. For more information about the full set of naming rules, see the object identifiers guide.
<new_user_name>The new name of the user, used with the RENAME TO option. The new user name can be any string, and can also contain spaces and non-alpha-numeric characters such as exclamation points (!), percent signs (%), at signs(@), dot signs (.), underscore signs (_), minus signs (-), and asterisks (*). If the string contains spaces or non-alphanumeric characters, it must be enclosed in single or double quotes.
<login_name>An optional, case-insensitive parameter to specify the name of the login to link the user with, used with the SET option. This cannot be used in conjunction with the SERVICE_ACCOUNT parameter - a user can be linked to a login OR a service account but not both. DEFAULT disassociates the user from its login. The user will become unusable before it’s re-associated with some login or service account.
<service_account_name>An optional parameter to specify the name of the service account to link the user with, used with the SET option. This cannot be used in conjunction with the LOGIN parameter - a user can be linked to a login OR a service account but not both. DEFAULT disassociates the user from its service account. The user will become unusable before it’s re-associated with some login or service account.
<database_name>An optional parameter to define a default database for the user. Used with the SET option.
<engine_name>An optional parameter to define a default engine for the user. Used with the SET option.

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Example

The following command will rename the “alex” account to “alexs”. 
ALTER USER "alex" RENAME TO "alexs";
This command will link the user “alex” to the “alexs@acme.com” login. 
ALTER USER alex SET LOGIN="alexs@acme.com";

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ALTER USER OWNER TO

Change the owner of a user. The current owner of a user can be viewed in the information_schema.users view on user_owner column. Check ownership page for more info.

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Syntax

ALTER USER <user_name> OWNER TO <user>

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Parameters

ParameterDescription
<user_name>The name of the user to change the owner of.
<user>The new owner of the user.