Exporting CSV file

Community Support
1

I want to export a CSV from kdb.
i want to add a tab with each column. How can i achieve that?

 

data: enlist"\n"sv ","0:rows

 

 

2

Hi ,

Your question isn’t very clear. Do you want to export a table to a csv, or a table with column headers that include tabs?

Have a look at Handling CSVs in kdb+ | A tour of the q programming language | Documentation for kdb+ and the q programming language - Kdb+ and q documentation (kx.com)

3

Hi  
I want to export a table to a csv, where each new rows with type string needs to have tabs under each column.

4

I’m not following your request. I read it as follows, which I don’t think is what you mean?

 

q)t:(c1:ab`c;c2:1 2 3) q){cc:count cols t;x:csv 0: x;(1#x),enlist[(csv sv cc# enlist enlist “\t”)],1_x} t “c1,c2” “\t,\t” “a,1” “b,2” “c,3” q)(count[cols t]#“*”;enlist csv) 0: {cc:count cols t;x:csv 0: x;(1#x),enlist[(csv sv cc# enlist enlist “\t”)],1_x} t c1 c2 ----------- ,“\t” ,“\t” ,“a” ,“1” ,“b” ,“2” ,“c” ,“3”

 

If you prepare you csv data and read from disk, you’ll recreate a table without needing to add tabs:

 

q)csv 0: t “c1,c2” “a,1” “b,2” “c,3” q)(count[cols t]#“*”;enlist csv) 0: csv 0: t c1 c2 --------- ,“a” ,“1” ,“b” ,“2” ,“c” ,“3”

 

Can you provide a before and after example of what you mean?

5

Before

After

6

Note, this was just a quick attempt:

q)testfile:flip {(1#x),“\t”,‘/:1_x} csv vs’ csv 0: t save `:testfile.csv