Here are examples of how to solve some common problems with MySQL. Some of the examples use the table shop to hold the price of each article (item number) for certain traders (dealers). Supposing that each trader has a single fixed price per article, then (article, deal- er) is a primary key for the records.

Start the command-line tool mysql and select a database:
shell> mysql your-database-name
(In most MySQL installations, you can use the database named test).
You can create and populate the example table with these statements:

mysql> CREATE TABLE shop (
-> article INT(4) UNSIGNED ZEROFILL DEFAULT '0000' NOT NULL,
-> dealer CHAR(20)
DEFAULT ''
NOT NULL,
-> price
DOUBLE(16,2)
DEFAULT '0.00' NOT NULL,
-> PRIMARY KEY(article, dealer));
mysql> INSERT INTO shop VALUES
-> (1,'A',3.45),(1,'B',3.99),(2,'A',10.99),(3,'B',1.45),
-> (3,'C',1.69),(3,'D',1.25),(4,'D',19.95);

Download pdf Examples of Common Queries