In the second and final part of our mysqldump best practices we will talk about how to handle the migration and import for stored program objects and views from your MySQL database. To read more about the prerequisites for a successful dump and restore operation for large MySQL databases, check out the first part of […]

Today we are going to guide you on how to show all users in the MySQL users Database. A common ...

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The post MySQL SHOW USERS: List All Users in a MySQL Database appeared first on RoseHosting.

If you have received the “Your PHP installation appears to be missing the MySQL extension which Is required by WordPress” ...

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The post Your PHP installation appears to be missing the MySQL extension which Is required by WordPress appeared first on RoseHosting.

So your MySQL server has crashed.  What do you do now?  When a server is down, in my opinion, there are two steps that are essential and both are extremely important and neither should be neglected:

1. Save diagnostic information for determining the root cause analysis (RCA).
2. Get the server back up and running.

Too many people rush to Step #2 and lose pertinent diagnostics from Step #1.  Likewise, too many people will spend too much time on Step #1 and delay getting to Step #2 and restoring service.  The goal is to collect diagnostics as quickly as possible for later review while getting service restored as fast as possible.

As a Technical Account Manager (TAM) and assisting on server restoration calls, I have seen both issues at play.  Technical resources have a tendency to get so bogged down in trying to understand the cause of the server outage that they …

Each SQL dialect is different in some way, shape, form, or fashion from the next flavor. Some dialects have this function, while others have that function. In this post, I cover porting over Oracle SQL to MySQL in order to count the number of occurrences of a specific weekday found in the current given month (at the time of writing) purely as a learning exercise focused on MySQL DATE functions and the WITH clause…

Image by tigerlily713 from Pixabay

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In this post, we will see how to setup MySQL NDB Cluster from a docker image. I assume that the reader has some basic understanding of docker and its terminology.

Steps to install MySQL NDB Cluster:

Let's create a MySQL NDB Cluster with the following environment:

MySQL NDB Cluster version (Latest GA version)1 Management Node4 Data Nodes1 Mysqld ServerConfiguration slots for upto 4 additional API nodes 
Note: Docker software must be installed and running on the same host where we are planning to install MySQL NDB Cluster. Also make sure we have enough resources allocated to docker so that we shouldn’t face any issues later on.

Step 1: Get the MySQL NDB Cluster docker image on your host

Users can get the MySQL NDB Cluster image from github site (link). Then …

(based on a conversation with a colleague, and a bit of Twitter)

A Conundrum

A developer colleague paged me with this:

mysql> select
UNIX_TIMESTAMP("2021-03-26 03:07:00" + INTERVAL 2 YEAR) -
UNIX_TIMESTAMP("2021-03-26 02:07:00" + INTERVAL 2 YEAR) as delta\G
delta: 420

It is obviously wrong, and weirdly so. It only works for “2 year”, not with other values:

mysql> select
UNIX_TIMESTAMP("2021-03-26 03:07:00" + INTERVAL 1-11 year_month) -
UNIX_TIMESTAMP("2021-03-26 02:07:00" + INTERVAL 1-11 year_month) as delta\G
delta: 3600

mysql> select
UNIX_TIMESTAMP("2021-03-26 03:07:00" + INTERVAL 1-12 year_month) -
UNIX_TIMESTAMP("2021-03-26 02:07:00" + INTERVAL 1-12 year_month) as delta\G
delta: 3600

mysql> select
UNIX_TIMESTAMP("2021-03-26 03:07:00" + INTERVAL 1-13 year_month) -
UNIX_TIMESTAMP("2021-03-26 02:07:00" + INTERVAL 1-13 …

As database footprints continue to explode, many companies are looking for ways to deal with such rapid growth.  One approach is to refactor traditional relational databases to fit into a NoSQL engine, where horizontal scalability is easier.  However, in many cases, this is in no way a trivial undertaking.

Another approach that has been gaining interest is the use of MyRocks as an alternative storage engine to the traditional InnoDB.  While not for everyone, in certain use cases it could be a potential solution.  As with so many things open source, the next standard questions are: which version should I use?  Any differences with the engine if I use MyRocks with MySQL 5.7 vs 8.0?

In this post, I wanted to touch on this and give some high-level thoughts on MyRocks when it comes to the version of MySQL.

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Sometimes clients want that the information they collected from the user should be encrypted and stored in a database. Data encryption and…

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It’s a problem for my students who purchased the new Apple hardware that uses Apple Silicon because they can’t install a Docker MySQL instance. However, there is Homebrew formula that works on macOS Big Sur and the new Apple silicon. It supports:

• Intel Silicon: macOS Big Sur, Catalina, and Mojave
• Apple Silicon: macOS Big Sur

The Homebrew Formula does have conflicts that you may need to avoid. It is a solution for those with the new Apple silicon.

As always, I hope this helps those looking for a solution.