Skip to main content

SQL DML Commands


1. Login in to the mysql client using the login name and password provided by your instructor (if
not already logged in).

2. View the existing databases that the MySQL Server is maintaining.

SHOW DATABASES;

3. Utilize the photo_album database.

USE photo_album;
---- If Need be, recreate the database and load the SQL data
in that will be used for this lab
CREATE DATABASE photo_album;
SOURCE /tmp/photo_album.sql;

4. Search the customers records for the customer with the following e-mail address:
hollywood@truedog.com

SELECT * FROM customers WHERE email_customer ='hollywood@truedog.com'\G

5. Search the logins records for logins associated with the customer identified in step 4.

SELECT * FROM logins WHERE email_customer ='hollywood@truedog.com';

6. In the customers table, update the customers e-mail address, identified in step 4, to
howleewood@truedog.com.

UPDATE customers SET email_customer = 'howleewood@truedog.com'
WHERE email_customer = 'hollywood@truedog.com';

7. Review the customers records to see if the change (from step 6) took place. If the update did
not take place, reissue the statement in step 6 to ensure the change takes place?

SELECT * FROM customers WHERE email_customer ='howleewood@truedog.com'\G

8. Review the logins table to see if the e-mails associated with the customer in step 6 were also
changed. If the e-mail associated with that customer were also changed in the logins table,
why?

SELECT * FROM logins WHERE email_customer ='howleewood@truedog.com'\G
Labels:

Comments

Post a Comment

Popular posts from this blog

PHP INTRODUCTION

                     PHP  (recursive acronym for  PHP: Hypertext Preprocessor ) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML. PHP stands for  P HP:  H ypertext  P reprocessor PHP is a server-side scripting language, like ASP PHP scripts are executed on the server PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.) PHP is an open source software PHP is free to download and use Why PHP? PHP runs on different platforms (Windows, Linux, Unix, etc.) PHP is compatible with almost all servers used today (Apache, IIS, etc.) PHP is FREE to download from the official PHP resource:  www.php.net PHP is easy to learn and runs efficiently on the server side What can PHP do? Anything. PHP is mainly focused on server-side scripting, so you can...
6 comments
Read more

SQL Joins

1. Login in to the mysql client using the login name and password provided by your instructor (if not already logged in). 2. View the existing databases that the MySQL Server is maintaining. SHOW DATABASES; 3. Utilize the photo_album database. USE photo_album; ---- If Need be, recreate the database and load the SQL data in that will be used for this lab CREATE DATABASE photo_album; SOURCE /tmp/photo_album.sql; 4. Query the database to display the active primary customer (email, first and last name) and all the associated active login names associated with that customer. SELECT customers.email_customer, customers.fname, customers.lname, logins.login_name  FROM customers, logins WHERE customers.email_customer = logins.email_customer  AND customers.active_customer = 'True'  AND logins.active_login = 'True';
Post a Comment
Read more

Storage Engine Breakdown

The following diagram represents a simplified view of the MySQL server and its interaction with the  storage engines. The following properties are storage engine dependant: • Storage Medium – Each table uses its own method of storing the data it contains. • Transactional Capabilities – Certain storage engines handle transactional processing which ensures that integrity of a database is maintained during the processing of multiple SQL statements.
Post a Comment
Read more