Showing entries 1 to 10 of 1185
10 Older Entries »
Displaying posts with tag: sql (reset)
5 Websites To Learn More SQL – Substack Repost

SQL is foundational in web and application programming. There are many websites and resources online to learn SQL. I like these 5 websites and think you will too…

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.

Read the article: 5 Websites To Learn More SQL

Support the OpenLampTech publication with your free subscription. Thank you!

Thank you for reading this post. Please share it …

[Read more]
CodeIgniter 4 Database Features Overview in 2022 – Substack Repost

CodeIgniter 4 is a solid, well-designed PHP framework and one I enjoy using and exploring every chance I get. In 2022, the CodeIgniter 4 team released many database-related upgrades. Learn more about the ones I found most significant in this OpenLampTech report.

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.

Head over to the OpenLampTech publication page and read more on this CodeIgniter 4 piece.

Want to support the OpenLampTech publication? …

[Read more]
OpenLampTech issue #58 – Substack Repost

OpenLampTech is back with another solid newsletter covering the PHP, MySQL, and LAMP stack media for you. I hope you are enjoying these newsletters. I know I learn and enjoy each and every one of them in more ways than one. Be sure and share the publication with someone else you think would be interested in this content. Thank you!

OpenLampTech has top-level sponsorship opportunities in the weekly newsletter for your brand, product, or service. As a starter publication, collaboration is very budget-friendly. Learn more by inquiring here.

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.

[Read more]
Simulate LEAD() Window Function using correlated subquery

In my honest opinion, MS Access is one garbage of a database. More likely, database is too strong of a word. While I won’t be using Access in this article, there is a story there (but I’m not here to have an Access bash party). Continue reading for an example of how you may use a correlated subquery and simulate the LEAD() Window Function.

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  …

[Read more]
OpenLampTech issue #54 – Substack Repost

We have another packed issue of OpenLampTech for you this week. And, we have our first sponsor with a smashing deal to help you configure your MySQL servers with ease. Thank you Releem for partnering with OpenLampTech this week!

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.

In OpenLampTech issue #54, we have content covering:

  • SQL Wildcards
  • PHP Magic Methods Explained
  • Managing CSS in WordPress block themes
  • WordPress as a Twitter alternative?
  • And much much more

[Read more]
AlmaLinux MySQL+Perl

A quick primer on Perl programs connecting to the MySQL database. It’s another set of coding examples for the AlmaLinux instance that I’m building for students. This one demonstrates basic Perl programs, connecting to MySQL, returning data sets by reference and position, dynamic queries, and input parameters to dynamic queries.

  1. Naturally, a hello.pl is a great place to start:
    #!/usr/bin/perl
    
    # Hello World program.
    print "Hello World!\n";
    

    After setting the permissions to -rwxr-xr-x. with this command:

    chmod 755 hello.pl
    

    You call it like this from the Command-Line Interface (CLI):

    ./hello.pl
    

    It prints:

    Hello World!
    
  2. Next, a connect.pl program lets us test the Perl::DBI connection to the MySQL database.
    #!/usr/bin/perl
    
    # Import libraries.
    use strict;
    use warnings;
    use v5.10;     # for …
[Read more]
INTERSECT and EXCEPT commands in MySQL

MySQL now supports the INTERSECT and EXCEPT set operators. Set operators work on the results of multiple SELECT statements. In this post, we will see example queries using INTERSECT and EXCEPT commands for a better understanding

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.

While MySQL has supported UNION and UNION ALL commands, there were no INTERSECT or EXCEPT commands in the language. This often involved work-around queries. However, MySQL now does support the INTERCEPT and EXCEPT set operators.

For the example queries, I am using 2 simple tables with arbitrary data.

The names …

[Read more]
INSERT Using the WITH Clause in MySQL

As of MySQL v8, we have Common Table Expressions (CTEs) or the WITH clause available. I recently learned how to use the WITH clause in an INSERT statement, similar to INSERT with SELECT. Like always, I enjoy sharing what I learn so let’s all learn together…

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.

For the sake of simplicity (and my sanity) I’m using this arbitrary sample data:

SELECT *
FROM auto_test;

We can use the WITH clause to generate

[Read more]
MySQL Metadata Queries – Column Structure and Definition With the COLUMNS Table

The INFORMATION_SCHEMA database is full of information and metadata about your database(s). Columns are a necessity and their definition ensures sound storage and data integrity. Learn all about them with the COLUMNS table.

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]
MySQL Metadata Queries – Find all tables in a Schema

Of course, there are other ways to determine what tables are present in a particular MySQL Database or Schema. You can also find this information if your database user account has permissions for the INFORMATION_SCHEMA database. Continue reading and follow along with an example query…

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]
Showing entries 1 to 10 of 1185
10 Older Entries »