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Write a program within embedded SQL to associative the total trip expenses of the salesman named ‘John' for the relations.
EXEC SQL BEGIN DECLARE SECTION; long total_expenses; EXEC SQL END DECLARE SECTION; EXEC SQL SELECT SUM(AMOUNT) INTO :total_expenses FROM EXPENSE WHERE TRIPIDIN (SELECT TRIP_ID FROM TRIP WHERE SSN = (SELECT SSN FROM SALEPERSON WHERE NAME = ‘John')); printf("\nThe total trip expenses of the salesman John is: %ld", total_expenses);
The First Normal Form (1NF) Let us first describe 1NF: Definition: A relation (table) is in 1NF if 1. There are no duplicate tuples or rows in the relation. 2.
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Define Signal. It allows methods to respond to events triggered by themselves or by other processes. Each signal corresponds to an exacting event. A signal is represented in Sy
Define a relation ? Relation - A relations is a named two-dimensional table of data. Mathematically, a relation can be described as a subset of the cartesian product of a lis
What is Asterisk in SQL? Asterisk (*): In SQL, the columns for all the tables and views in the FROM clause will be displayed.
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
What is Data dictionary? A data dictionary is a reserved space in a database that is employed to store information about the database itself. A data dictionary may consist o
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