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System level permissions: With the use of data dictionary you can view them.
Let us take the table name as user_sys_privs (used in oracle).
DESCRIBE USER_SYS_PRIVS ;
SELECT * FROM USER_SYS_PRIVS ;
All these commands are very definite to a data base system and may be dissimilar on dissimilar DBMS.
DATABASE OBJECTS: VIEWS, SEQUENCES, INDEXES AND SYNONYMS
Some of the important concepts in a database system are the views and indexes.
Views are a mechanism that can support data independence and security. Indexes help in better query responses. Let us discuss about them along with two more concepts sequences and synonyms in more details.
read-set(T) : Each data items that are read by a transaction T Timestamps : for all transaction T, the start-time and the end time are reserved for all the three phases.
give some example real-life situations where DBMS are most suiitabe
Hierarchical model is also known by? A hierarchical model is also known as a Tree structure.
Draw the database using the ER approach and then make the tables accordingly. Populate the tables so that every table have at least 10 tuples. Then using Java and SQL, execute the
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
What are views? Explain how views are different from tables? A view in SQL terminology is a one table in which is derived from other tables. These other tables could be base t
Differentiate between a unique key and a primary key. - By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
Question 1 What do you mean by database management system? Question 2 Write a note on Object-Oriented Model Question 3 Explain Sequential File Organization Question
Differentiate between various levels of data abstraction? Data Abstraction - Abstraction is the procedure to hide the irrelevant things from the users and represent the rele
Before defines the second type of integrity constraint, viz., Entity Integrity, we should be well-known with the concept of NULL. Mostly, NULL is intended as a basis for dealing
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