PostgreSQL is a richer environment with more data types and more operators, and it’s closer to the SQL standard implementation. I am a big fan of the MERGE() function, as I spent part of my career in the processing of cash register transaction logs where this function shines. This might...
“Connection management is the best argument for MySQL. Nevertheless, there is actually no real reason not to use PostgreSQL in any relational use case. This is especially true if you consider the developments in the last 3 years. Postgresql is years ahead of any competitor when it comes to ...
This completely maps to my experience as well. I still believe Postgres' defaults being set to use an absolute minimum footprint, especially prior to PostgreSQL 9, significantly impacted it's adoption. It's better now, although IMO it could still do with an easier configuration where you could...
As a result the performance of linear writes on aJBODconfiguration with six 7200rpm SATA RAID-5 array is about 600MB/sec but the performance of random writes is only about 100k/sec—a difference of over 6000X.这也是为什么HBase、ES将所有的insert、update、delete操作都统一看成顺序写操作,避免...
PostgreSQL became open-source within the last decade. Open-source technologies have a lot of advantages: They have broader communities, are more transparent, and are often better secured. With an open-source solution, the source code is available for everyone to look at and improve upon....
Which migration is more common: MySQL to PostgreSQL or PostgreSQL to MySQL? The migration frequency between MySQL and PostgreSQL varies and depends on individual organizations' needs and requirements. Some organizations maymigrate from MySQL to PostgreSQLto take advantage of its advanced features, better...
an SQLite database at the same time, only one process can make changes to the database at any given time. This means that while SQLite supports greater concurrency than most other embedded database management systems, it cannot support as much as client/server RDBMSs li...
MySQL community edition is licensed under GPL. Postgres is released under the PostgreSQL license which is a liberal Open Source license similar to the BSD or MIT licenses. Even though MySQL adopts GPL, some people still are concerned that MySQL is owned by Oracle. It's also the reason that ...
PostgreSQL and MySQL arerelational databasesthat organize data into tables. These tables can be linked — or related — based on data that is common to each. Relational databases enable your business to better understand the relationships among available data and help gain new insights for making ...
So instead of query with LIMIT 1000,10 you will have WHERE position between 1000 and 1009, which has the same efficiency for any position (as long as it is indexed) Force index if needed In some cases, MySQL Optimizer may prefer to use a different index, which has better selectivity or...