Learn what data integrity in DBMS means, why it’s vital for database accuracy, and how to maintain it effectively. Read on to protect your data now.

The post Data Integrity in a Database: How to Ensure Accuracy and Security appeared first on Devart Blog.

Hi all,

I’ve just been playing with DBeaver community and have migrated an old postgres schema to mysql with very little hassle.

After this, I’ve looked more into Dbeaver and found the following survey: https://dbeaver.com/2024/05/31/survey-results-shaping-the-future-with-customer-feedback/

Quite interesting!

Especially as one would think that a data migration task is more a DBA task. Good to know!

I also found the following links useful:

dbeaver.com/docs/dbeaver/Data-transfer

No option to dump DB without data #2176

…

Percona has a great set of tools known as the Percona Toolkit, one of which is pt-upgrade. The idea behind this tool is to replay a captured sequence of queries that were executed on a different database server. This is very useful to validate if a new version of the database server works as expected […]

This article examines ANSI SQL, the universal SQL standard that ensures compatibility across databases such as PostgreSQL, Oracle, MySQL, and SQL Server. Learn its history, key features, components, and benefits, and understand how it compares to vendor-specific SQL dialects in building scalable, maintainable, and cross-platform database systems.

The post What Is ANSI SQL and Why You Should Use It  appeared first on Devart Blog.

Index maintenance can be a real challenge for anyone managing databases, and what makes it even trickier is that open source databases each handle it differently. In this post, we’ll take a closer look at how those differences show up in practice, and what they mean for you. When rows are added, updated, or deleted […]

In a previous blog post, we've advertised the use of SQL EXISTS rather than COUNT(*) to check for existence of a value in SQL. I.e. to check if in the Sakila database, actors called WAHLBERG have played in any films, instead of: SELECT count(*) FROM actor a JOIN film_actor fa USING (actor_id) WHERE a.last_name = … Continue reading An Efficient Way to Check for Existence of Multiple Values in SQL →

Introduction In this article, we are going to see how Index Selectivity works in relational database systems and why the database Optimizer might choose to avoid using an index if the number of matching records is large. Index selectivity is inversely proportional to the number of index entries matched by a given value. So, a unique index has the highest selectivity because only a single entry can be matched by any given value. On the other hand, if column values are skewed, then a column value matching a large number of table... Read More

The post Index Selectivity appeared first on Vlad Mihalcea.

I’ve had this list on a post-it note on my monitor for all of 2022. I figured it was time to write it down, and reuse the space.

In summary, AWS suffers from the same problem that almost every other product does. It sacrifices improved security for backward compatibility of functionality. IMO this is not in the best practices of a data ecosystem that is under constant attack.

• Storage should be encrypted by default. When you launch an RDS cluster its storage is not encrypted. This goes against their own AWS Well-Architected Framework Section 2 – Security.
• Plain text passwords. To launch a cluster you must specify a password in plain text on the command line, again not security best practice. At least change this to using a known secret from AWS secrets manager.
• TLS for administrative accounts should be the only option. The root user should only be REQUIRE SSL (MySQL syntax).
• Expanding on …

Percona Monitoring and Management tool (PMM) is an Open Source product which was developed to help DBAs and developers to monitor and manage MySQL, PostgreSQL and MongoDB performances. In this blog post, we will see that we can do much more with it!
I discovered this tool 2 years ago when I started a monitoring study for a customer, and ever since, I’ve been in love with it. I will explain you why.

It’s Open Source! Even if money is not everything…

PMM is completely Open Source, and this is not surprising coming from Percona. But as we know, the advantage of Open Source is not only the fact of being free…

Let’s …

I’ve been doing a lot of database stuff lately, and not much PHP, so when I returned to make my first Laravel project for a while, I had to check the docs to remind myself how some of this works. I noticed that the default approach to database credentials is still to use separate credentials for the host, port, and other variables. I’m using Aiven databases (because I work there and managed databases are great for demo apps as well as real ones!) which supply connection strings, but Laravel supports these too.

For MySQL, the database connection string from Aiven is in the format:

mysql://username:password@hostname:port/dbname

You can remove the configuration for DB_* and instead use the variable DATABASE_URL with the full string.

Pro-tip: Laravel’s built …