在12月“DB-Engines关系型数据库排行榜”中，国产数据库TiDB、OceanBase、阿里云PolarDB分列44、52、53位；南大通用GBase数据库在关系型数据库中全球排名第61位，较去年同期（77位）提升16名，排名国产数据库第四名；腾讯TDSQL数据库（77位）和华为OpenGauss数据库（79位）则紧随其后，分别位列国产数据库第五、六名。

不知道有多少人清楚的知道，在Oracle中，如果一个复合索引，假定索引(a,b,c)三个字段，删除了(包括unused)其中一个字段，Oracle会怎么处理这个索引。同样，如果是约束，Oracle又怎么处理? 用oracle为例子，我又拿mysql做了一个对比，看看mysql是怎么处理这个问题的。

Specifically, MySQL Autopilot uses internalized machine learning to assist users for some tasks, and applies closed-loop automation to handle others. It assists users ...

It’s not an exaggeration to say that the speed at which an enterprise can analyze business-critical data directly impacts its ability to compete. Time matters when it comes to mission-critical ...

The founder of MySQL Michael Widenius "Monty" claims that Oracle is killing off his MySQL database and he is recommending that people move to his new project MariaDB. In an interview with Muktware ...

AUSTIN, Texas, March 29, 2022 /PRNewswire/ -- Oracle today announced that Oracle MySQL HeatWave now supports in-database machine learning (ML) in addition to the previously available transaction ...

【中关村在线北京行情】Oracle MySQL企业版数据库软件，近日在商家“钰源时代(服务器软件专营)”特价促销，优惠价为28500元，好物好价，值得您入手！感兴趣的朋友可直接前往北京市海淀区知春路49号详询，关于Oracle MySQL企业版数据库软件的促销信息也可咨询 ...

Florian Mueller, coordinating opposition to Oracle's purchase of Sun Microsystems and mySQL, sent a note today cheering word that Oracle has asked for, and gotten, a six-day delay to answer European ...

我们日常使用的数据库主要包括Oracle、MySQL、DB2和SQL Server等。在操作Oracle数据库时，PL/SQL是匹配度最高的工具之一。那么如何利用PL/SQL创建定时任务？接下来将简要介绍通过该工具实现定时器功能的具体步骤与方法。

【中关村在线北京行情】Oracle MySQL集群版数据库软件，近日在商家“北京钰源科技”特价促销，优惠价为67000元，好物好价，值得您入手！感兴趣的朋友可直接前往北京市海淀区知春路49号详询，关于Oracle MySQL集群版数据库软件的促销信息也可咨询（联系电话 ...

AWS users can now run transaction processing, real-time analytics, and machine learning in one service with MySQL MySQL HeatWave delivers 7X better price performance compared to Amazon Redshift and ...