I recently needed to add multiple columns to an existing table to store summary data calculations and wondered if I could do it in one MySQL ALTER TABLE statement. Turns out you can. And, it’s super simple. Convenient too. Continue reading and learn what I learned…
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The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you …
[Read more]I’ve once again published a massive issue of the OpenLampTech newsletter, the newsletter for PHP/MySQL developers. If you’re looking to learn more about PHP and MySQL, you’ve come to the right place…
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The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the …
[Read more]In MySQL, the @@sql_mode parameter should generally use ONLY_FULL_GROUP_BY. If it doesn’t include it and you don’t have the ability to change the database parameters, you can use a MySQL PSM (Persistent Stored Module), like:
Create the set_full_group_by procedure:
-- Drop procedure conditionally on whether it exists already.
DROP PROCEDURE IF EXISTS set_full_group_by;
-- Reset delimter to allow semicolons to terminate statements.
DELIMITER $$
-- Create a procedure to verify and set connection parameter.
CREATE PROCEDURE set_full_group_by()
LANGUAGE SQL
NOT DETERMINISTIC
SQL SECURITY DEFINER
COMMENT 'Set connection parameter when not set.'
BEGIN
/* Check whether full group by is set in the connection and
if unset, set it in the scope of the connection. */
IF NOT EXISTS
(SELECT NULL
WHERE REGEXP_LIKE(@@SQL_MODE,'ONLY_FULL_GROUP_BY'))
THEN
SET SQL_MODE=(SELECT CONCAT(@@sql_mode,',ONLY_FULL_GROUP_BY'));
END IF; …[Read more]
This blog post is an excerpt from premium MySQL Beginner content I am creating to help anyone learn how to use MySQL. Thank you for reading and please do provide feedback.
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You may also be interested in the blog post, MySQL Beginners Series — The SELECT statement, which is a primer for this article.
Limit …
[Read more]I am so pleased to announce that I have published my very first mini eBook, “10 MySQL Tips For Everyone”. Continue reading to find out what it’s about, and how to get your copy.
What is the 10 MySQL Tips For Everyone eBook about?
In this eBook, I share 10 useful tips for anyone working with the MySQL database. These tips are a mix of the relatively common, and a couple of my personal own that I have realized or discovered as I continue to learn MySQL.
Here are a couple of my favorites.
So you’re (hopefully) wondering how you can get your own free copy of “10 MySQL Tips For Everyone”.
Super easy…
The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.
That’s it.
…[Read more]Get ready for another jam-packed full OpenLampTech newsletter issue this week. If you are a PHP/MySQL developer, this is the newsletter for you. Let’s see what this latest issue has in store…
The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.
Just like always, we have some great curated and original content in this week’s issue:
If you are like me, you enjoy your newsletter reading time. If you are a PHP/MySQL developer or a blogging developer yourself, then this post is definitely for you. Continue reading for additional details…
The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.
Image by Gerd Altmann from …
[Read more]Joining individual pieces of text data into a singular string is nothing new in the programming world and all languages support some form of concatenation. In MySQL, you can use the CONCAT() function. Let’s see how…
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The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the …
[Read more]Do you know what time it is? The time for your weekly PHP/MySQL content is here! Enjoy OpenLampTech issue #17. As always there is plenty to read in this latest issue…
The Newsletter for PHP and MySQL Developers
Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.
Image by Clker-Free-Vector-Images from …
[Read more]Being mindful of NULL values is a good practice. NULLs can slip up on you and give you a heck of a time (especially in calculations) if you aren’t careful. In this post, we will see examples of NULLtransformation with the MySQL COALESCE() function.
Do you want to learn how to use MySQL but are not sure of where to start? I am creating premium MySQL Beginners content to help anyone understand the basics of using MySQL. Get a short, actionable email tip each week and more information on the premium articles and content as they are released.
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