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Whst is logical schema ?
Logical schema is the entire database.
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Which is the properties of entities? Attributes is the properties of entities.
In which format database schema is written ? Data base schema is written in the DDL format.
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
Depending upon the rules we have found, we can classify the locks into two types. Shared Lock: A transaction might be acquiring shared lock on a data item in order to read it
Explain the benefit of OOM. Main benefits of object oriented modeling are development of system become fast, quality of the system get improve. It gives freedom of use of alrea
(a) Differentiate between information and data . (b) List and briefly explain five potential benefits of the database approach compared to conventional file systems. (c) Diff
Differentiate between a subquery and a join If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are t
Examples:- Hierarchical Model: It tells data as and relationships by hierarchy of data values. Figure illustrates an example of hierarchical model. Now a day's these models are
All edges of a cube are expanding at a rate of 6 centimeters per second. How fast is the surface area changing when each edge is (a) 2 centimeters and (b) 10 centimeters?
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