how to make a primary key / foreign key on 2 unkeyed tables ?
1. how to make a primary key / foreign key on 2 unkeyed tables ?2. Same as #1, except it has to be a compound key
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Machine learning and KDB+ - Kaggle competition.
Hello q folks, I've implemented a linear regression model (with L2 regression) on some Kaggle competition data - particularly this one - https://www.kaggle.com/c/house-prices-advanced-regression-techniques (named "House Prices-Advanced regression tec...
hcount raw file size
For a compressed file, I noticed hcount and read0 return its uncompressed format. I could understand for read function but how do I get raw size as seen by ls?http://www.timestored.com/kdb-guides/kdb-io-file-read-write-functions`:tmp/t set t1(`:tmp/t...
intersting "function" question
Good day Q-Gods, I have an interesting question which I have been struggling with for a while now. I have two tables (t1, t2)t1:time px qty 1 10 100 2 20 200 2 20.1 200.1 4 40 400 4 40.1 400.1 5 50 500t2 is a "derivative" of t1. Please note that px a...
what does -r cmd line option do ?
http://code.kx.com/wiki/Reference/Cmdline-r :H:P[:user[:password]]replicate from :host:portBut is there a practical use case you can define ?
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