bash - SQLITE3 Import .csv via Mac Terminal and Skip the First Row -


i have thousands of .csv files i'd import sqlite3 database. each .csv file has labels on first row.

my idea run loop on file names , import them using .import command:

    sqlite3 options.db ".mode csv data" ".import $f data"

the problem import first row contains labels.

question: how .import .csv files without importing first row of each file?

thanks helping! :d

assume file1.csv looks this:

file1,line1 file1,line2 file1,line3 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 1,2,3,4,5,6

and file2.csv looks this:

file2,line1 file2,line2 file2,line3 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 1,2,3,4,5,6

then can make awk print csv files whilst skipping first line (where fnr, i.e. file line number, 1) this:

awk -f, 'fnr==1{next} 1' *csv

output

file1,line2 file1,line3 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 1,2,3,4,5,6 file2,line2 file2,line3 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 1,2,3,4,5,6

then can check number of fields present on each line, , if not 23, add many commas necessary make 23:

awk -f, 'fnr==1{next} nf!=23{$0=$0 substr(",,,,,,,,,,,,,,,,,,,,,,",1,23-nf)}1' *csv

output

file1,line2,,,,,,,,,,,,,,,,,,,,, file1,line3,,,,,,,,,,,,,,,,,,,,, 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,,,,, 1,2,3,4,5,6,,,,,,,,,,,,,,,,, file2,line2,,,,,,,,,,,,,,,,,,,,, file2,line3,,,,,,,,,,,,,,,,,,,,, 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,,,,, 1,2,3,4,5,6,,,,,,,,,,,,,,,,,

so, actual complete solution, this:

awk -f, 'fnr==1{next} nf!=23{$0=$0 substr(",,,,,,,,,,,,,,,,,,,,,,",1,23-nf)}1' *csv > newbigfile.csv

and import newbigfile.csv sqlite.


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