we have following relations:Supplier(S#,sname,status,city)Parts(P#,pname,color,weight,city)SP(S#,P#,quantity)Answer the following queries.(1) Find s# of supplier who supplies ‘red’ part.(2) Count number of supplier who supplies ‘red’ part.(3) Sort the supplier table by sname?
Question
we have following relations:Supplier(S#,sname,status,city)Parts(P#,pname,color,weight,city)SP(S#,P#,quantity)Answer the following queries.(1) Find s# of supplier who supplies ‘red’ part.(2) Count number of supplier who supplies ‘red’ part.(3) Sort the supplier table by sname?
Solution
The language used in the question is SQL (Structured Query Language), which is used to manage and manipulate databases. Here are the SQL queries for each of your questions:
(1) To find the supplier number (s#) of the supplier who supplies the 'red' part, you would use a JOIN to combine the relevant tables and then specify the color in the WHERE clause:
SELECT Supplier.S#
FROM Supplier
JOIN SP ON Supplier.S# = SP.S#
JOIN Parts ON SP.P# = Parts.P#
WHERE Parts.color = 'red';
(2) To count the number of suppliers who supply the 'red' part, you would use the COUNT function in combination with the previous query:
SELECT COUNT(DISTINCT Supplier.S#)
FROM Supplier
JOIN SP ON Supplier.S# = SP.S#
JOIN Parts ON SP.P# = Parts.P#
WHERE Parts.color = 'red';
(3) To sort the supplier table by supplier name (sname), you would use the ORDER BY clause:
SELECT *
FROM Supplier
ORDER BY sname;
Please replace the table and column names with your actual table and column names if they are different.
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