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Consider the subsequent relations along with keys underlined
Street (name, location, city) House (number, street_name) Lives (name, house_number) Define the above relations as tables in SQL making real world assumptions about the kind of the fields. Define the primary keys and the foreign keys.
Create table street (name character(30) primary key, location character(30), city character(30)); Create table house( number integer primary key, street_name character(30) references street(name)); Create table lives ( name character(30) primary key, house number integer references house(number));
State the Object Design for Processing The object design phase comes after analysis and system design phase. The object design phase includes implementation details like as i
Which model is record based logical model? Network Modelis basically known as record based logical model.
Distributed Control and Data sharing: The geographical distribution of an organization can be showed in the distribution of the data; if a number of different sites are linked to e
a. Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two ho
Describe in brief about the Sequence Diagrams Sequence diagrams are interaction diagrams which emphasize time ordering of messages. In UML, it is shown as a table which shows
SELECT Statement This statement is used for retrieving information from the databases. It can be coupled with many clauses. Let us talk about these clauses in more detail:
database help
Types of Locks There are two necessary types of locks: Binary lock : This locking mechanism has two states for to a data item: locked or unlocked Multiple-mode loc
What are data models? Explain it detail? Entity relationship model Rectangles Ellipse Diamonds Lines Relational model Relational model use a collection
Define Serializable schedule Serializable schedule: An interleaved schedule of much more than one transaction is known as a serializable schedule, if it is equal to some serial
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