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Combine csv files of same structure

 

There are multiple csv files of same structure in a directory. These files have similar prefixes:

stock_301500.csv

stock_320688.csv

CODE,DT,OP,CL

301500,2023-06-02,71,67.8

301500,2023-06-05,79.35,72.61

301500,2023-06-06,75.8,77.65

CODE,DT,OP,CL

320688,2023-06-02,33,32

320688,2023-06-05,28.37,30.23

320688,2023-06-06,27.19,28.54

Use Java to combine the csv files as a single file.

Here is the SPL code:

=directory@p("D:\\data\\stock_*.csv").(file("result.csv").export@tca(T(~)))

directory@p lists file names with full paths according to the wild character. export@tca writes the two-dimensional table to a file; @t option means exporting column names; @c enables using the csv format; an d @a means append-write.
SPL also supports SQL syntax. The following code will get the same result.

$select * into result1.csv from D:\\data\\stock_*.csv

Read How to Call a SPL Script in Java to find how to integrate SPL into a Java application.

Source:https://stackoverflow.com/questions/73444435/reading-data-form-multiple-csv-file-and-writing-it-into-one-csv-file-using-sprin


 
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