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Consistency error: These errors happen due to the inconsistent state of database caused may be due to wrong implementation of commands or in case of a transaction abort. To overcome these errors the database system should contain routines that check for the consistency of data entered in the database.
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
sy bcs project of hospital managment system
Define outer union operation of the relational algebra. Compute the outer union for the relations R and S given below. Outer Join - If there are any values in one tabl
what is physical data structure
Niles Video Inc. wants to create a website for online sales of movies (DVD and videotapes). People will be allowed to register as customers on the website and to update their store
Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following
Which is another name for weak entity? Child is another name of weak entity.
A set of possible data values is called? A set of possible data values is called as domain.
Define the terms i) DDL ii) DML DDL: Data base schema is specified by a set of definitions expressed by a special language known as a data def
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
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