Home Accessibility Courses Twitter The Mouth Facebook Resources Site Map About Us Contact
Python, Lua and Tcl - public course schedule [here]
Private courses on your site - see [here]
Please ask about maintenance training for Perl, PHP, Java, C, C++, Ruby, MySQL and Linux / Tomcat systems
Stored procedure calculating from a query
this example from a Well House Consultants training course
More on this [link]

This example is described in the following article(s):
   • MySQL stored procedures / their use on the web from PHP - [link]

Source code: stp6 Module: S163

# We are defining a procedure which will include semicolons
# so change to some other delimiter for our instructions


# Clean up - get rid of any previous procedure of this name


# Define the procedure ...


# Declare the type of some regular variables
DECLARE itsdone INT;
DECLARE present_name TEXT;

# We're going to do some SQL, so set up a cursor -
# this is rather like a file handler; we'll use the
# cursor to know where we are in reading back the
# result if the query

DECLARE pointer CURSOR FOR select name from partner;

# We also need to tell MySQL what to do when it reaches
# the end of the result set, and to initialise the variable
# we used so it knows it's not at the end before it starts!

SET itsdone=0;

# Parse the results on the cursor called 'pointer'
SET i=0;
OPEN pointer;

        # Get a row, save the column(s) returned
        FETCH pointer INTO present_name;

        # If we failed to get data because fetch
        # triggered the end of cursor handler,
        # leave the loop
        IF itsdone=1 THEN LEAVE thisloop;
        END IF;

        # Do something (very little - it's a demo)
        # with what we got
        SET i=i+1;

# When we are completely done, make up a result set
# to pass back as a result of calling this procedure.

SELECT CONCAT('There are now ',i,' partners') as rezult;
CLOSE pointer;

# End of Procedure

# Signal end of definition to MySQL


# Switch back to normal delimiters

Learn about this subject
This module and example are covered as required on private courses. Should you wish to cover this example and associated subjects, and you're attending a public course to cover other topics with us, please see our extra topic program.

Books covering this topic
Yes. We have over 700 books in our library. Books covering are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "this" training module. You'll find a description of the topic and some other closely related examples on the "this" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre.
The Horse's mouth provides a daily tip or thought.
• Further resources are available via the resources centre.
• All of these resources can be searched through through our search engine
• And there's a global index here.

Purpose of this website
This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

Web site author
This web site is written and maintained by Well House Consultants.

Conditions of use
Past attendees on our training courses are welcome to use individual examples in the course of their programming, but must check the examples they use to ensure that they are suitable for their job. Remember that some of our examples show you how not to do things - check in your notes. Well House Consultants take no responsibility for the suitability of these example programs to customer's needs.

This program is copyright Well House Consultants Ltd. You are forbidden from using it for running your own training courses without our prior written permission. See our page on courseware provision for more details.

Any of our images within this code may NOT be reused on a public URL without our prior permission. For Bona Fide personal use, we will often grant you permission provided that you provide a link back. Commercial use on a website will incur a license fee for each image used - details on request.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2018: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01225 708225 • FAX: 01225 793803 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/resources/ex.php4 • PAGE BUILT: Sun Jan 31 13:04:01 2016 • BUILD SYSTEM: WomanWithCat