SQL script add user to all content database

SET NOCOUNT ON;

DECLARE @user_name    SYSNAME

        , @login_name SYSNAME;

SELECT @user_name = ‘Domain\Account’,

       @login_name = ‘Domain\Account’

SELECT '

    USE ' + QUOTENAME(NAME) + '

CREATE USER ' + QUOTENAME(@user_name)

       + '

    ALTER ROLE [db_owner] ADD MEMBER [Domain\Account]

    GO

 

'

FROM   sys.databases

WHERE  database_id > 4

       AND state_desc = 'ONLINE'

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• execute the results to text then can copy and paste to run it 
• excluded the system database