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Write short notes on Schema diagram.
A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears as a box with attributes listed inside it and the relation name above it.
What is the difference between internal tables and extract datasets? The lines of an internal table always have the similar structure. By using extract datasets, you can ha
Emergence of Client Server Architecture Some of the pioneering work that was completed by some of the relational database vendors permitted the computing to be distributed on m
Submit the SQL Statements necessary to create your database according to the following guidelines: Your SQL statements should exactly mirror your ERD. All primary keys,
What is the meaning of Data Independence ?
The Database administrator (DBA) uses the data dictionary in each phase of a database life cycle, beginning from the data gathering phase to the design, execution and maintenance p
What is a cascading update? Referential integrity constraints needs that foreign key values in one table correspond to primary key values in another. If the value of the primar
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
How external/conceptual mapping and conceptual /internal mapping is performed
What is a view? How it is related to data independence? A view might be thought of as a virtual table, that is, a table that does not really exist in its own right but is inste
object oriented database
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