Today lets talk a little about converting a MySQL table to CSV (Excel). My friend was looking to export MySQL to Excel, I saw couple of questions for export MySQL…
The post Export MySQL database table to CSV (delimited / Excel) file first appeared on Change Is Inevitable.
In this blog post, we’ll look at ways you can use MySQL 5.7 generated columns (or virtual columns) to improve query performance.
Introduction
About two years ago I published a blog post about Generated (Virtual) Columns in MySQL 5.7. Since then, it’s been one of my favorite features in the MySQL 5.7 release. The reason is simple: with the help of virtual columns, we can create fine-grained indexes that can significantly increase query performance. I’m going to show you some tricks that can potentially fix slow reporting queries with GROUP BY and ORDER BY.
The Problem
Recently I was working with a customer who was struggling with this query:
SELECT CONCAT(verb, ' - …[Read more]
via GIPHY I was at a dinner party recently, and talking with some colleagues. I had worked with them years back on Oracle systems. One colleague Maria said she really enjoyed my newsletter. Join 38,000 others and follow Sean Hull on twitter @hullsean. She went on to say how much has changed in the last …
Continue reading "How is automation impacting the dba role?"
“Our three megastores’ and webshop’s combined revenue was 432 million euros in the year 2017. Galera Cluster has been the cornerstone of the system, secured our sales and supported our growth.”
“MySQL master/slave setup was just too fragile and needed regular work to fix each time the slave got out of sync. Now with Galera we’ve found that even if we take a node offline for a while, it re-syncs automatically and without intervention.”
“The big plus is that all nodes have exact the same information, and no node is running for even a fraction of a second behind. This will also mean that no information will be lost!”
Introduction –
Maxscale is an excellent Proxy from Mariadb Corporation, which providing the High Availability, Realtime RW split with replication Glaera cluster Amazon RDS Amazon Aurora, binlog streaming and many more advanced features, here in this blog we will discuss one such feature,
In this blog post, i am going to share my recent activity with Maxscale. We had to help one of our client to archive only the DML ( CREATE & INSERT ) data into archive server from specific table.
Problem Statement –
Our client is having only one standalone ( Master ) setup and a Archive server , they need to archive one …
[Read more]We had a great webinar on Wednesday looking at how we can use Tungsten Replicator for moving data into Elasticsearch, whether that’s for analytics, searching, or reporting.
You can ahead and watch the video recording of that session here
We had one question on that session, which I wanted to answer in full:
Can UPDATE and DELETE be converted to INSERT?
One of the interesting issues with replicating databases between databases is that we don’t always want the information in the same format when it goes over another side. Typically when replicating within a homogeneous environment the reason we are using replication is that we want an identical copy over on the other side of the process. In heterogeneous, especially when we move the data out to an analytics environment like Elasticsearch, we might not. That covers a whole range of …
[Read more]
I do a lot of data analysis lately, and I try to find answers to
questions through data for my companies pressing questions. Let's
look at the past year of 2017 and answer questions for people who
like music.
artist is the artist name
track is the artist's track name
list_date is which chart date the artist show up on the
top200
streams is the number of plays following spotify specific
rules
Let's look at the data set
select count(*) from spotify.top200 WHERE country='us' and
list_date >= '2017-01-01' and list_date <
'2018-01-01';
+----------+
| count(*) |
+----------+
| 74142 |
+----------+
1 row in set (0.04 sec)
How many artists made it in the top200 for the United
States?
mysql> select count(DISTINCT(artist)) from spotify.top200
WHERE …
FOSDEM is next weekend and I am talking about Parallel Replication on Friday, February 2nd at the MySQL Pre-FOSDEM Day (there might be tickets left in case of cancellation, attendance is free of charge). During this talk, I will show benchmark results of MySQL 8.0 parallel replication on Booking.com real production environments. I thought I could share a few things before the talk so here it
Percona announces the release of Percona XtraDB Cluster 5.7.20-29.24 (PXC) on January 26, 2018. Binaries are available from the downloads section or our software repositories.
NOTE: Due to new package dependency,
Ubuntu/Debian users should use apt-get dist-upgrade,
apt upgrade, or apt-get install
percona-xtradb-cluster-57 to upgrade.
Percona XtraDB Cluster 5.7.20-29.24 is now the current release, based on the following:
I started to use Percona Monitoring and Management (PMM) recently because it seems promising, and my friends from Percona always recommending it to try out, and frankly, at first sight, I like it. There are few things which I am not happy about, but mostly I feel OK – but when it comes to the […]
