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select min e,max e,avg e by n from`t.csv (billion row challenge)

`t 2'`t.csv  [>>>k.k("2'","t",pandas.read_csv("t.csv"))]
select [count first last min max sum avg var dev med ..] by from where ..
while(..)if(..)else .. in .. exp log sqrt sin cos ..
flip flop list sort asc desc unique group key val .. 

Verb    (monad)      Adverb              Noun
+ +                  ' each              char    " ab"          
- -                  / over right        name    ``ab
* *      exp         \ scan left         int     2 3 4
% div    log                             float   2 3.4
& and    flip        \l load            
| or     flop        \t time
< <      asc         \v vars         z.d date    2001.01.01  
> >      desc        \w work         z.t time    12:34:56.789
= =      group       \\ exit        
~ ~      ~
! mod    index                          
. .      value
@ @      first       I/O                 Class
? find   unique      0' line             List    (2;3.4)
# take   count       1' char             Dict    {a:2 3}
_ drop   root        2' data             Table   [a:2 3]
^ cut    sort        3' set*             Expr    :2+a
, ,      ,           4' get*             Func    {[a]2+a}    

rosetta        Atom         List   atom   list        Ddd Mm
k      ()[].;: +-*%&|<>=~$! @?#_^, -*%_~$ @,#!!|^<>?= ..! @&  f'       F'        while(a)if(b)c else d
python ()[].;= +-*/&|<> ^ %  is2sa -els~s   lrwrsa u2 dvk @t [f(x)..] [F(x,y)..] while a:if b:c else:d 
(index slice2 split append;exp log sqrt str;len range where reverse sort argsort unique2;dict key value;transpose)

Type   int float geo boolean char name date time
Class  List Dict Array Table Expression Function(* immutable)

             ifgbcndt  LDATEF*       devs
k      1992  833...88  ++++++*    300spartans
sql    1992  32 . .22     -  *     20million
python 1991  .... .    --          10million
 numpy 2005  433   99    +   *      5million
go     2009  422..                  2million
nodejs 1995  . . .     --          15million
excel  1982  . . .         + *     80million
c      1972  42                     5million
apl    1962  . ..        +   *