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What is Asterisk in SQL?
Asterisk (*): In SQL, the columns for all the tables and views in the FROM clause will be displayed.
What does the cardinality ratio specify? Mapping cardinalities or cardinality ratios state the number of entities to which another entity can be associated. Mapping cardinaliti
Consider the relation schemas as follows. works (person name, company name, salary); lives (person name, street, city); located in(company name, city); managers (person name
explain the mapping constraints
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Hierarchical model is also known by? A hierarchical model is also known as a Tree structure.
What is deadlock? Neither of the transaction can ever proceed with its normal implementation. This situation is known as deadlock.
Create an index for the table Client, field CLIENT_NO of Q ? Command: CREATE INDEX client_client_no ON client(client_no);
Define a view and a trigger. Construct a view for the above relations that have the information about suppliers and the elements they supply. The view holds the S#, SNAME, P# , PNA
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