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The Comparison of Oracle8i andMS SQL SERVER
Last term we have learnt MY SQL SERVER , and this term we contact the
world-famous Oracle database though the Database Principles taught by Mr
Mu.Oracle8i is a relatively stable product of Oracle Corporation. After using a
little time, I have some personal experience between the comparison of Oracle8i
and MS SQL SERVER. For my limited level, it is estimated that there are some
problems understanding.
The first is on the concept of database. The concept of Oracle database has been
completely different from the MS SQL's. Oracle's services and databases match
MS SQL database services. Oracle's services are composed of background
processes and related memory. Database is equal to the collection of data files.
Oracle's service is fully separated by the data files .Then how to find the
database similar to MS SQL's database?
(1)Set up a data table space (equivalent to MS SQL database data files)
(2)Establish temporary table space (equivalent to MS SQL database transaction
log file)
(3)To establish the users, but in his table the space and temporary table space are
just the establishment of the two tables’ space
(4)To the authorized user, at least the role of the role of authority is Connect
(5)Landing on the user, create their own table, view, examples of view, sequence,
processes, functions, packages, synonyms, etc.
Following is about the comparison of the Sys and System users by the Oracle and
of the master of MS SQL. The database on master of MS SQL store some
configuration information of the current database services such as databases
equipment which in MS SQL has been weakened, character sets, data files,
landing accounts with a database, the entire preparation parameters, and other
information services. Oracle's Sys stores Oracle services or examples of
information for all users and data dictionary information. This is different from
MS SQL, and on MS SQL database every object has its own data dictionary
information .System users have data dictionaries which are view information.
With these views, we query the database for information on special. In special
circumstances, the system users have the role of DBA system's competence, and
SYS not only has DBA authority also has the authority of SysDBA.
What is the difference between the two system role,DBA and SysDBA?
fengluoyan
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