A relation Vehicles is given below:
V_no Type Company Price Qty
AW125 Wagon Maruti 250000 25
J0083 Jeep Mahindra 4000000 15
S9090 SUV Mitsubishi 2500000 18
M0892 Mini van Datsum 1500000 26
W9760 SUV Maruti 2500000 18
R2409 Mini van Mahindra 350000 15
Write SQL commands to:
a. Display the average price of each type of vehicle having quantity more than 20.
b. Count the type of vehicles manufactured by each company.
c. Display the total price of all the types of vehicles.
Answers
Answer:
a. select Type, avg(Price) from Vehicle group by Type having Qty>20;
b. select Company, count(distinct Type) from Vehicle group by Company;
c. Select Type, sum(Price* Qty) from Vehicle group by Type;
Explanation:
SELECT - extracts data from a database
UPDATE - updates data in a database
DELETE - deletes data from a database
INSERT INTO - inserts new data into a database
CREATE DATABASE - creates a new database
ALTER DATABASE - modifies a database
CREATE TABLE - creates a new table
ALTER TABLE - modifies a table
DROP TABLE - deletes a table
CREATE INDEX - creates an index (search key)
DROP INDEX - deletes an index
SQL stands for Structured Query Language
SQL lets you access and manipulate databases
SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987
SQL can execute queries against a database
SQL can retrieve data from a database
SQL can insert records in a database
SQL can update records in a database
SQL can delete records from a database
SQL can create new databases
SQL can create new tables in a database
SQL can create stored procedures in a database
SQL can create views in a database
SQL can set permissions on tables, procedures, and views
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