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Create role named role_table that allows a user to create tables. Using role_table allow users kripa and reena to create tables.
CREATE ROLE role_table; GRANT CREATE ANY TABLE TO role_table; GRANT role_table TO kripa, reena;
Explain the Concept of Two-phase Locking It concerns the positions of locking and unlocking operations in each transaction. In this protocol every transaction issue lock and u
Define lock? Lock is the most common used to execute the requirement is to permit a transaction to access a data item only if it is currently holding a lock on that item.
Design a generalization–specialization hierarchy for a motor-vehicle sales company. The company sells motorcycles, passenger cars, vans, and buses. Justify your placement of attrib
What is persistency? Persistency ensures which data is stored and that after the object is no longer available (program stops running) the data will be available to other users
Problem : (b) A deductive database system is essentially the outcome of applying mathematics logic to database management, where logic is used for both data representation and
Explain ODBC? ODBC - Open DataBase Connectivity (ODBC) enable the integration of SQL along with a general-reasons programming language.
Define the Boyce-Codd Normal Form with instance and also Compare BCNF and 3NF. Ans: BCNF: For each functional dependency X->Y in a set F of functional dependencies over relati
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
What is multiple relationship ?
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
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