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authorBoris Verkhovskiy <boris.verk@gmail.com>2024-04-19 02:19:54 -0700
committerBoris Verkhovskiy <boris.verk@gmail.com>2024-04-19 02:19:54 -0700
commitecd16aedf90bff3f37692780090edada9012ebba (patch)
tree97c54ef76af699bede6efed5458132b66e9d39a7 /kdb+.html.markdown
parentfbd84cf623b0a27c0704cb0c0845dd2317b835ec (diff)
[kdb+/en] highlight and update links
Diffstat (limited to 'kdb+.html.markdown')
-rw-r--r--kdb+.html.markdown35
1 files changed, 16 insertions, 19 deletions
diff --git a/kdb+.html.markdown b/kdb+.html.markdown
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@@ -11,24 +11,22 @@ and released by Kx systems in 2003. q is a descendant of APL and as such is
very terse and a little strange looking for anyone from a "C heritage" language
background. Its expressiveness and vector oriented nature make it well suited
to performing complex calculations on large amounts of data (while also
-encouraging some amount of [code
-golf](https://en.wikipedia.org/wiki/Code_golf)). The fundamental structure in
-the language is not the object but instead the list, and tables are built as
-collections of lists. This means - unlike most traditional RDBMS systems -
-tables are column oriented. The language has both an in-memory and on-disk
-database built in, giving a large amount of flexibility. kdb+ is most widely
-used in the world of finance to store, analyze, process and retrieve large
+encouraging some amount of [code golf](https://en.wikipedia.org/wiki/Code_golf)).
+The fundamental structure in the language is not the object but instead the list,
+and tables are built as collections of lists. This means - unlike most traditional
+RDBMS systems - tables are column oriented. The language has both an in-memory
+and on-disk database built in, giving a large amount of flexibility. kdb+ is most
+widely used in the world of finance to store, analyze, process and retrieve large
time-series data sets.
The terms *q* and *kdb+* are usually used interchangeably, as the two are not
separable so this distinction is not really useful.
-All Feedback welcome! You can reach me at matt.doherty@aquaq.co.uk, or Jonny
-at jonny.press@aquaq.co.uk
+To learn more about kdb+ you can join the
+[KX Community forums](https://learninghub.kx.com/forums/) or
+the [TorQ kdb+](https://groups.google.com/forum/#!forum/kdbtorq) group.
-To learn more about kdb+ you can join the [Personal kdb+](https://groups.google.com/forum/#!forum/personal-kdbplus) or [TorQ kdb+](https://groups.google.com/forum/#!forum/kdbtorq) group.
-
-```
+```q
/ Single line comments start with a forward-slash
/ These can also be used in-line, so long as at least one whitespace character
/ separates it from text to the left
@@ -47,7 +45,7 @@ To learn more about kdb+ you can join the [Personal kdb+](https://groups.google.
/ We have integers, which are 8 byte by default
3 / => 3
-/ And floats, also 8 byte as standard. Trailing f distinguishes from int
+/ And floats, also 8 byte as standard. Trailing f distinguishes from int
3.0 / => 3f
/ 4 byte numerical types can also be specified with trailing chars
@@ -656,7 +654,7 @@ t lj le
/ => Polly 52 160 f 85
/ => John 25 178 m 78
-/ aj is an asof join. This is not a standard SQL join, and can be very powerful
+/ aj is an asof join. This is not a standard SQL join, and can be very powerful
/ The canonical example of this is joining financial trades and quotes tables
trades:([]time:10:01:01 10:01:03 10:01:04;sym:`msft`ibm`ge;qty:100 200 150)
quotes:([]time:10:01:00 10:01:01 10:01:01 10:01:03;
@@ -700,7 +698,7 @@ first each (1 2 3;4 5 6;7 8 9)
/ The true alternatives to loops in q are the adverbs scan (\) and over (/)
/ their behaviour differs based on the number of arguments the function they
-/ are modifying receives. Here I'll summarise some of the most useful cases
+/ are modifying receives. Here I'll summarise some of the most useful cases
/ a single argument function modified by scan given 2 args behaves like "do"
{x * 2}\[5;1] / => 1 2 4 8 16 32 (i.e. multiply by 2, 5 times)
{x * 2}/[5;1] / => 32 (using over only the final result is shown)
@@ -761,10 +759,10 @@ select from splayed / (the columns are read from disk on request)
////// Frameworks //////
/ kdb+ is typically used for data capture and analysis.
/ This involves using an architecture with multiple processes
-/ working together. kdb+ frameworks are available to streamline the setup
+/ working together. kdb+ frameworks are available to streamline the setup
/ and configuration of this architecture and add additional functionality
/ such as disaster recovery, logging, access, load balancing etc.
-/ https://github.com/AquaQAnalytics/TorQ
+/ https://github.com/DataIntellectTech/TorQ
```
## Want to know more?
@@ -772,5 +770,4 @@ select from splayed / (the columns are read from disk on request)
* [*q for mortals* q language tutorial](http://code.kx.com/q4m3/)
* [*Introduction to Kdb+* on disk data tutorial](http://code.kx.com/q4m3/14_Introduction_to_Kdb+/)
* [q language reference](https://code.kx.com/q/ref/)
-* [Online training courses](http://training.aquaq.co.uk/)
-* [TorQ production framework](https://github.com/AquaQAnalytics/TorQ)
+* [TorQ production framework](https://github.com/DataIntellectTech/TorQ)