PDO stands for PHP Data Object and it's an extension that provides an interface for communicating with many supported popular database systems such as MySQL and Oracle, PostgreSQL and SQLite, etc.

It's provided starting with PHP 5.1.

Since PDO abstracts away all the differences between various database management systems, you only need to change the information about your database in your code in order to change the database system used in your PHP application.

Setting up PDO

PDO is added by default starting with PHP 5.1 but you need to set the necessary database driver in the php.ini file: extension=pdo.so extension=pdo_mysql.so

Creating a MySQL Database

Let's start by creating a MySQL using the mysql client. In your terminal, run the following command: $ mysql -u root -p

Enter your MySQL database password when prompted.

Next, run the following SQL instruction to create a …

In this tutorial we'll learn how to use MySQLi and PDO to create MySQL database tables in PHP 7.

You can use the CREATE DATABASE SQL instruction to create a database in your MySQL client so let's start by creating a database. Open a new terminal and run the following command: $ mysql -u root -p

Enter your MySQL instance password when prompted.

Note: The official tool for working with MySQL is the mysql client which get installed when you install MySQL in your machine. The MySQL client can be used through your terminal as a CLI tool.

Next, you can run the following command to create a MySQL database: mysql> create database mydb;

That's it! We now have a database.

Let's now see how you can create a MySQL table using PHP, MySQLi and PDO.

The mysqli extension is a relational database driver that allows you to access the functionality provided by MySQL 4.1 and above in PHP. It stands …

We have covered session management in ExpressJs using a global variable technique which of course will not work in case of shared server or concurrent execution of HTTP requests which is the most familiar production scenario. Codeforgeek readers requested to provide a solution for this issue and the optimal one is to use external session […]

We have covered session management in ExpressJs using global variable technique which of course will not work in case of shared server or concurrent execution of http requests which is most familiar production scenario.

Codeforgeek readers requested to provide solution for these issue and the optimal one is to use external session storage which is not dependent on application requests, answer is Redis cause this is the light weight and easy to use NoSQL database.

In this tutorial i am going to explain how to design and code session oriented express web applications by using Redis as external session storage.

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To get familiar with Session handling in ExpressJS I recommend to read our first article …

Node.js and MySQL is one of the necessary binding needed for any web application. MySQL is one of the most popular open source database in world and efficient as well. Almost every popular programming language like Java or PHP provides driver to access and perform operations with MySQL.

In this tutorial i am trying to cover code for learning and code for production. So if you know this already and looking for ready made code for production. Click here to jump there directly.

Introduction:

Node.js is rich with number of popular packages registered at package registry called …

In my prior blog post on Terraform, I demonstrated building the dependent infrastructure that MySQL implementations need.  Building MySQL isn’t much different, but does identify a need for a Webserver to provide configuration files for Terraform to execute on as was done in my prior MySQL on OCI post, and a Yum Repo Webserver to… Read More »

In my prior blog post on Terraform, I demonstrated building the dependent infrastructure that MySQL implementations need.  Building MySQL isn’t much different, but does identify a need for a Webserver to provide configuration files for Terraform to execute on as was done in my prior MySQL on OCI post, and a Yum Repo Webserver to… Read More »

The past couple of blog entries have been on Geographic Information Systems and Geometric Data.  Visualizing that data with MySQL Workbench makes it easier for me to see what the results really mean.

So how do you get there?

Start Workbench, create a new SQL Tab in your favorite scratch schema, and crate the table below. 

CREATE TABLE `test` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `geom` GEOMETRY NULL,
  PRIMARY KEY (`id`));

Next add some data.

INSERT INTO `test` …

As we continue the development of our Percona Operators to simplify database deployment in Kubernetes (Percona Server for MongoDB Operator 0.3.0 and Percona XtraDB Cluster Operator 0.3.0), one very popular question I get is: how does deployment in Kubernetes affect MySQL performance? Is there a big performance penalty? So I plan to look at how to measure and compare the performance of Kubernetes deployments to bare metal deployments. Kubernetes manages a lot of infrastructure resources like network, storage, cpu, and memory, so we need to look individually at different components.

To begin: I plan to run a single MySQL (Percona Server) instances in …

The last blog entry was very popular and there were lots of requests for some introductory information on the spatial data types. 

Well Known Text Or Binary
I am going to use the GEOMETRY data type over POINT, LINESTRING, or POLYGON as it can store any of those three while the other three can only contain data matching their name (so POINT can holds only point data, etc.). The values are stored in an internal geometry format but it takes wither WKT or WKB formatted data.

Those are Well-Known Text (WKT) or Well-Known Binary (WKB) formats repectively. I am hoping most of your are better with text than binary so the following examples demonstrate how to insert geometry values into a table by converting WKT values to internal geometry format.

So let us start with a …