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I know I can doraze table_listBut that require every single table in the table list with the same columns.For my use case, I can addept adding columns with null values, if that column doesn't exist in all tables.In that case, I can do(uj) over table_...

For example in the below table, I want to run the cumulative sum on "val" column of the table, grouped by the symbol column. but I want to cap the cumulative sum by the value in the "cap" column. If the cumulative sum exceeds the cap, I just cap it a...

I am trying to build my project with k.h. I have downloaded the c.o file from http://kx.com/q/l64/ and link against it. It found most of the extern "C" stuff except function dl. I keep getting undefined reference to `dl'Is there any other objects I a...

I have a bunch of tables on the file system. I need to read all of them into memory and merge them together. It seems like using raze or (uj), I will inevitable read all of them, then merge them together. That will at least double the memory usage. H...

I know I can do something like select first price, first volume by date, sym from tab. That gives me the first price and first column of each date, sym pair. But what if I want to select the first entire row, without having to list all the column nam...