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What are the technique to define a schema completely ?
A schema is completely define by DDL and DML query language.
Every simple attribute of an entity type have a possible set of values that can be attached to it. This is known as the domain of an attribute. An attribute cannot have a value out
Describe the difference between a one-to-many and a many-to-many relationship. Which logical data structures comprise one-to-many and which comprise many-to-many relationship?
WHAT IS MEANT BY E-R MODEL
Modular growth: In distributed environments, it is simple to expand. Latest sites can be added to the network without affecting the operations of other sites, as they are somewhat
write a database program for concurrency transaction in a bank
Enumerate or state the steps in creating a relevant database of a shop.
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
Complete replication: It implies maintaining of a whole copy of the database at every site. Thus, the reliability & availability and performance for query response are maximized.
Name the three major set of files on disk that compose a database in Oracle. There are three main sets of files on disk that compose a database. All the files are binary. These
what do you mean by primary key constraint?
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