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In which format database schema is written ? Data base schema is written in the DDL format.
Attributes and its types explain?
Question 1 What are the advantages of DBMS approach in managing data? Question 2 What are the services provided by a database system Question 3 List and briefly describe
Which database level is closest to the users? External database level is closest to the users.
Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
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
what is er digram given that example of hospital,bank and library er digram.
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
write-set(T): Each data items that are written by a transaction T
1. Staff(staffID, firstName, lastName, availabilityID, experience, phone, mobile, email); 2. Availability(availabilityID, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday,
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