| Paradigm | Array, functional |
|---|---|
| Designed by | Arthur Whitney |
| Developer | Kx Systems |
| First appeared | 2003[1] |
| Stable release | 4.0
/ March 17, 2020[2] |
| Typing discipline | Dynamic, strong |
| Website | code |
| Influenced by | |
| A+, APL, Scheme, k | |
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, a terse variant of the language APL. Q is a thin wrapper around k, providing a more readable, English-like interface. One of the use cases is financial time series analysis, as one could do inexact time matches. An example is to match the a bid and the ask before that. Both timestamps slightly differ and are matched anyway.[3]
- ^ "Q Language Widening the Appeal of Vectors". Archived from the original on January 1, 2007. Retrieved June 1, 2016.
{{cite web}}: CS1 maint: unfit URL (link) - ^ "Changes in 4.0" (Press release). Palo Alto: Kx Systems. Mar 17, 2020. Retrieved Apr 15, 2020.
- ^ "Q Reference Card". Retrieved 15 April 2020.
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