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Scalegrid
JANUARY 19, 2024
For example, memory-resident databases without persistent disks, such as Redis cluster setups or Apache Spark installations, rely on stand-alone machines. To traditional relational databases, where rollbacks are less likely to cause data loss, MongoDB differs significantly.
Percona
JUNE 4, 2023
Before we dive into the differences between MariaDB and MySQL, we will provide a thorough examination of each relational database management system (RDBMS). While originally designed to be a drop-in replacement for MySQL, it evolved into its own distinct database management system and is now maintained and supported by the MariaDB Foundation.
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Percona
JANUARY 14, 2019
What if we use ClickHouse (which is a columnar analytical database) as our main datastore? Well, typically, an analytical database is not a replacement for a transactional or key/value datastore. Although such databases can be very efficient with counts and averages, some queries will be slow or simply non existent. Text search.
SQL Performance
OCTOBER 29, 2019
In order to use Query Store and Extended Events, you have to configure them in advance – either enabling Query Store for your database(s), or setting up an XE session and starting it. DMV data is always available, so very often it's the easiest method to get a quick first look at query performance. CustomerID , c. GROUP BY c.
SQL Performance
APRIL 10, 2019
The ISO/IEC 9075:2016 standard, or SQL:2016 in short, introduces support for a profound concept called Row Pattern Recognition (RPR) in SQL. You can find coverage of RPR, including illustrated examples, in a 90-page technical report ISO/IEC TR 19075-5 (available for free). price ) AS bottomprice , LAST ( C.
Percona
JANUARY 17, 2019
On multi-core machines – which is the majority of the hardware nowadays – and in the cloud, we have multiple cores available for use. I’m using the “Airlines On-Time Performance” database from [link] (You can find the scripts I used here: [link] ). With faster disks (i.e. AWS Aurora (based on MySQL 5.6) MySQL on ec2.
SQL Performance
JULY 1, 2019
Nevertheless, if you run this query yourself, you are quite likely to see the same result I do: The execution plan depends on the version of SQL Server used, and does not depend on database compatibility level. The more complex SQL Server 2016+ plan does not use the ANY aggregate at all. Reproducing the bug in SQL Server 2016+.
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