Machine Learning and Big Data with kdb+/q¶ by Jan Novotny, Paul A. Bilokon, Aris Galiotos, and Frederic Deleze. Offers quants, programmers and algorithmic traders a practical entry into the powerful but non-intuitive kdb+ database and q programming language. Amazon

kdb+ is a powerful database that can be used for streaming, real-time and historical data. Q is the SQL-like, general-purpose programming language built on top of kdb+. It offers high-performance, in-database analytic capabilities.

Defining q as a command allows you to invoke kdb+ without specifying the path to it. The q interpreter refers to environment variable QHOME for the location of certain files. Without this variable, it will guess based on the path to the interpreter. Better to set the variable explicitly.

kdb+支持分布式架构，允许构建集群以处理大规模数据，实现了水平扩展和负载均衡。kdb+具备强大的查询语言，即q语言，基于APL编程语言，支持向量化操作，使数据分析和查询操作变得高效且便捷。想自己试试kdb+的童鞋可以移步官网 https:// code.kx.com/q/learn/ 。

Q is a programming language for array processing, developed by Arthur Whitney. It is proprietary software, commercialized by Kx Systems. Q serves as the query language for kdb+, a disk based and in-memory, column-based database. Kdb+ is based on the language k, …

2011年3月6日 · At kdbfaq, we refer to kdb+® as kdb. q is the programming language of kdb. It’s a small layer of syntatic sugar on top of k, plus several significant extensions and new datatypes. k4 is simply an old name for q.

2016年8月1日 · 《使用kdb+ q进行机器学习和大数据的存储库——quantQ》是由Novotny等人创建的一个项目，旨在利用kdb+ q语言处理和分析大规模数据，并应用到机器学习领域。

kdb+具备强大的查询语言，即 q语言 ，基于 APL编程语言 ，支持向量化操作，使数据分析和查询操作变得高效且便捷。 想自己试试kdb+的童鞋可以移步官网 https:// code.kx.com/q/learn/ 。

A cheat sheet notebook of Q language of Kx.com. Kdb+ is the world’s fastest time-series database and q is its unique language. Most codes are modified from the samples of the book "Q for M...

Functions defined in q.k are loaded as part of the ‘bootstrap’ of kdb+. Some are exposed in the default namespace as the q language. Others are documented here as utility functions in the .Q namespace. The .Q namespace is reserved for use by KX, as are all single-letter namespaces.