Software

Huawei Gauss DB

Huawei GaussDB is an enterprise-class AI-Native distributed database that uses the massively parallel processing (MPP) architecture.

GaussDB supports both row and column-oriented storage and is capable of processing petabytes of data. GaussDB offers a cost-efficient, general-purpose computing platform to manage massive data sets and is compatible with a wide range of data warehousing systems, business intelligence (BI) systems, and decision support systems (DSS).

Huawei GaussDB integrates AI technology into the database kernel architecture and algorithms, providing users distributed databases with higher performance, higher availability, and more diverse computing power.
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Documentación y recursos

How to repair SQL Server databases with Stellar Repair MS SQL

How to Repair Corrupt SQL Database with the help of Stellar Repair for MS SQL software.Most Recommended software by MVP's and administrators to repair corrupt MDF and NDF files. It recovers tables, triggers, indexes, keys, rules and stored procedures. It supports SQL Server 2017, 2016, 2014, 2012, 2008, 2008R2 and all lower versions.

The beginners guide to NoSQL

Beginners guide to NoSQLTake advantage of noSQL by learning the basics and more with this FREE eBook offered by Robert Gordon University that includes:

  • An introduction to noSQL
  • The four different types of noSQL database that exist
  • The difference between SQL and noSQL and which to choose for your work

 
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Entradas de blog

Detecting indexes, tables and packages not used on DB2

By Oscar_paredes on Mon, 02/10/2020 - 19:53

DB2, from version 9.7, allows to know easily what indexes are not being used in a Database. The query is also for tables and packages.

This is a useful tool for tuning indexes and detecting problems in their use.

After version 9.7 DB2 includes a new LASTUSED field in the SYSCAT.INDEXES, SYSCAT.TABLES and SYSCAT.PACKAGES tables.

This field indicates the date of last use of indexes, tables or packages.

For example, to query unused indexes since 1/1/2019, you could use this simple query:

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Publicaciones en la red

Does Column Order Matter in MySQL Multi Column
Indexes

    Multi column indexes are a powerful way to speed up queries but they are often misunderstood.  In most other databases an index on columns a, b, and c can only be used when searching on columns (a,b,& c), (a & b), and (a)  -- according to the manual. Also that index supposedly can not be used to search for (b & c) or just (c).  Well, that is the way I learned it and the way…

Read on:

https://elephantdolphin.blogspot.com/2021/10/does-column-order-matter-i…

MySQL 8.0 – locking details

Recently, I saw many interest in understanding and getting information about database locking.

MySQL InnoDB’s locking can be complex and having an overview not always simple.

For more information about how InnoDB locking is working, I can only recommend this excellent series of articles by Kuba:

  • …
Read on:

https://lefred.be/content/mysql-8-0-locking-details/

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