Why is the language developers and DBAs use to organize data such a mess? Here are 13 reasons we wish we could quit SQL, even ...

They store data in clearly defined tables and simulate ... one user may belong to multiple communities, a product may be ...

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs.

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs.

简介： 在 Flink 1.12 中，针对目前 operator chaining 无法覆盖的场景，推出了 multiple input operator 与 source chaining 优化。该优化将消除 Flink 作业中大多数冗余 shuffle，进一步提高作业的执行效率。本文将以一个 SQL 作业为例介绍上述优化，并展示 Flink 1.12 在 TPC-DS 测试集 ...

In yii we can write our custom or row query for complex queries here is an example of custom query with multiple table joins $data = Yii::app()->db->createCommand ...

Fetching data from the database takes a lot time process. Eventually when you need to combine multiple tables in order to fetch the data, reducing database calls becomes very meaningful. Although in ...