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Write short notes on relational model
The relational model uses a collection of tables to show both data and the relationships between those data. The relational model is an example of a record based model.
HOW MANY TYPES OF VIEWS
what should be included in this???
Consider the E/R schema with weak entity sets shown below. Come up with the SQL CREATE TABLE statements (with appropriate primary key, unique and foreign key constraints). Include
A B-tree of order how much children m has maximum ? m has maximum m mchildren in a B tree.
Mappings between Levels and Data Independence The 3 levels of abstraction in the database do not exist separately of each other. There must be some correspondence, or mapping
What are the benefits of prepared statements and place holders? Parameter binding operations automatically handle escaping of characters Encourage Statement reuse
How does a query tree represent a relational algebra expression? Ans: This includes transforming an initial expression (tree) into an equivalent expression (tree) that is
Which data type can store unstructured data? Raw data type can store unstructured data.
Our company hires independent contractors to install equipment at precise locations across North America. We want to track the installation data and generate reports. The compan
State the Steps of Object Design Object design is a very iterative process in which various classes, relationships among objects are added when you move from one level to
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