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can see all the user data, but not objects owned by SYS If you change the parameter to TRUE, then ANY really does mean ANY and JON will be able to see the data dictionary as well as all user data It is possible that some older application software may assume that the ANY privileges include the data dictionary, as was always the case with release 7 of the Oracle database (hence the name of the parameter) If so, you have no choice but to change the parameter to TRUE until the software is patched up to current standards TIP Data dictionary accessibility is sometimes a problem for application installation routinesYou may have to set O7_DICTIONARY_ACCESSIBILITY to TRUE while installing a product, and then put it back on default when the installation is finished If you have users who really do need access to the data dictionary, rather than setting O7_DICTIONARY_ACCESSIBILITY to true, consider granting them the SELECT ANY DICTIONARY privilege This will let them see the data dictionary and dynamic performance views, but they will not be able to see any user data unless you have specifically granted them permission to do so This might apply, for example, to the staff of an external company you use for database administration support: they need access to all the data dictionary information, but they have no need to view your application data

The Character and Paragraph palettes are the only two not visible on the screen by default when the program first launches If your screen resolution is set to larger than 832 768, the Brushes and File Browser palettes are docked by default in an area to the right of the Options bar called the Palette Well

The remote REMOTE_LOGIN_PASSWORDFILE instance parameter controls whether it is possible to connect to the instance as a user with the SYSDBA or SYSOPER privilege over the network With this parameter on its default of NONE, the only way to get a SYSDBA connection is to log on to the operating system of the server machine as a member of the operating system group that owns the Oracle software This is absolutely secure as long as your server operating system is secure, which it should be Setting this parameter to either EXCLUSIVE or SHARED gives users another way in: even if they are not logged on to the server as a member of the Oracle owning group, or even if they are coming in across the network, they can still connect as SYSDBA if they know the appropriate password The passwords are embedded, in encrypted form, in an operating system file in the Oracle home directory: $ORACLE_ HOME/dbs on Unix, or %ORACLE_HOME%\database on Windows A setting of SHARED means that all instances running of the same Oracle home directory will share a common password file This will have just one password within it for the SYS user that is common to all the instances EXCLUSIVE means that the instance will look for a file whose name includes the instance name: PWDinstance_nameora on Windows, orapwinstance_name on Unix, where instance_name is the instance name This file will have instance-specific passwords

Create the password file by running the orapwd utility from an operating system prompt This will create the file and embed within it a password for the SYS user Subsequently, you can add other users passwords to the file, thus allowing them to connect as SYSDBA or SYSOPER as well Review the scripts in 2 for an example of the syntax for creating a password file To add another user to the file, grant them either the SYSDBA or SYSOPER privilege, as in Figure 6-10 The V$PWFILE_USERS view shows you which users have their passwords entered in the password file, and whether they have the SYSOPER privilege, the SYSDBA privilege, or both Note that when connecting as SYSDBA, even though you use a username and password, you end up connected as user SYS; when connecting as SYSOPER, you are in fact connected as the PUBLIC user Enabling a password file does not improve security; it weakens it, by giving users another way of obtaining a privileged connection (in addition to local operating system authentication, which is always available) It is, however, standard practice to enable it, because without a password file it may be very difficult to manage the database remotely TIP Some computer auditors do not understand operating system and password file authentication They may even state that you must create a password file, to improve security Just do as they say it is easier than arguing PART I