DBA Role In Oracle database, DBA could be the most privileged role. Whenever we want to make a user to be the most dominant application… Read More »DBA Role, How and Why
EM_EXPRESS_ALL Whereas EM_EXPRESS_BASIC provides some basic privileges to monitor properties through EM, EM_EXPRESS_ALL, also an Oracle predefined role, has some more advanced privileges which enable… Read More »EM_EXPRESS_ALL, How and Why
Enterprise Manager (EM) Enterprise Manager (EM) is a graphical management tool that provides centralized capabilities of managing Oracle databases and servers. In recent releases, EM… Read More »EM_EXPRESS_BASIC, How and Why
SELECT_CATALOG_ROLE Oracle designs several privileges and roles for users who want to query database dictionary views. Two of them are usually used by DBA to… Read More »SELECT_CATALOG_ROLE, How and Why
NLS_DATE_FORMAT defines the display format of a datetime string, which can be set at various levels to meet business requirements. That is to say, NLS_DATE_FORMAT… Read More »NLS_DATE_FORMAT, How and Why
Unlimited failed logon attempts is certainly convenient for developers and users to access the database, but it leaves a chance for brute force attack to… Read More »FAILED_LOGIN_ATTEMPTS, How and Why
SYS.USER$ is a table which stores all user's password information. Generally, the table should be used only by Oracle internal system and not DBA. If… Read More »USER$, How and Why
SYS.USER_ASTATUS_MAP provides a list of account status bit and their definitions. Let's see its content. In which, ASTATUS stands for "Account STATUS". SQL> show user… Read More »USER_ASTATUS_MAP, How and Why
The data dictionary DBA_USERS_WITH_DEFPWD tells us that the users who are still using their default passwords defined in table DEFAULT_PWD$. For example, we have some… Read More »DBA_USERS_WITH_DEFPWD, How and Why