Question

Turn in TWO original queries using MySQL and the output from the queries with the follow requirements:

1) two or more joined tables

2) 6 or more attributes

3) Nested select OR having OR group by

Answer 1

Let's look at a selection from the "Orders" table:

OrderID	CustomerID	OrderDate
10308	2	1996-09-18
10309	37	1996-09-19
10310	77	1996-09-20

Then, look at a selection from the "Customers" table:

CustomerID	CustomerName	ContactName	Country
1	Alfreds Futterkiste	Maria Anders	Germany
2	Ana Trujillo Emparedados y helados	Ana Trujillo	Mexico
3	Antonio Moreno Taquería	Antonio Moreno	Mexico

1) QUERY:

SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate
FROM Orders
INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID;

OUTPUT:

OrderID	CustomerName	OrderDate
10308	Ana Trujillo Emparedados y helados	9/18/1996
10365	Antonio Moreno Taquería	11/27/1996
10383	Around the Horn	12/16/1996
10355	Around the Horn	11/15/1996
10278	Berglunds snabbköp	8/12/1996

2) QUERY:

SELECT CustomerID, CustomerName, ContactName, Address, City, Country FROM Customers;

OUTPUT:

CustomerID	CustomerName	ContactName	Address	City	Country
1	Alfreds Futterkiste	Maria Anders	Obere Str. 57	Berlin	Germany
2	Ana Trujillo Emparedados y helados	Ana Trujillo	Avda. de la Constitución 2222	México D.F.	Mexico
3	Antonio Moreno Taquería	Antonio Moreno	Mataderos 2312	México D.F.	Mexico
4	Around the Horn	Thomas Hardy	120 Hanover Sq.	London	UK
5	Berglunds snabbköp	Christina Berglund	Berguvsvägen 8	Luleå	Sweden
6	Blauer See Delikatessen	Hanna Moos	Forsterstr. 57	Mannheim	Germany
7	Blondel père et fils	Frédérique Citeaux	24, place Kléber	Strasbourg	France
8	Bólido Comidas preparadas	Martín Sommer	C/ Araquil, 67	Madrid	Spain
9	Bon app'	Laurence Lebihans	12, rue des Bouchers	Marseille	France
10	Bottom-Dollar Marketse	Elizabeth Lincoln	23 Tsawassen Blvd.	Tsawassen	Canada

3)

Consider the CUSTOMERS table having the following records −

+----+----------+-----+-----------+----------+
| ID | NAME     | AGE | ADDRESS   | SALARY   |
+----+----------+-----+-----------+----------+
|  1 | Ramesh   |  35 | Ahmedabad |  2000.00 |
|  2 | Khilan   |  25 | Delhi     |  1500.00 |
|  3 | kaushik  |  23 | Kota      |  2000.00 |
|  4 | Chaitali |  25 | Mumbai    |  6500.00 |
|  5 | Hardik   |  27 | Bhopal    |  8500.00 |
|  6 | Komal    |  22 | MP        |  4500.00 |
|  7 | Muffy    |  24 | Indore    | 10000.00 |
+----+----------+-----+-----------+----------+

Now, let us check the following subquery with a SELECT statement.

SQL> SELECT * 
   FROM CUSTOMERS 
   WHERE ID IN (SELECT ID 
         FROM CUSTOMERS 
         WHERE SALARY > 4500) ;

This would produce the following result.

+----+----------+-----+---------+----------+
| ID | NAME     | AGE | ADDRESS | SALARY   |
+----+----------+-----+---------+----------+
|  4 | Chaitali |  25 | Mumbai  |  6500.00 |
|  5 | Hardik   |  27 | Bhopal  |  8500.00 |
|  7 | Muffy    |  24 | Indore  | 10000.00 |
+----+----------+-----+---------+----------+