EXCEL CSV

import.sql

TRUNCATE TABLE dua_xlsx;
LOAD DATA 
	LOCAL INFILE 'C:\\Users\\skynet\\AppData\\Local\\Temp\\dua_xlsx.csv' 
	INTO TABLE `file_collection`.`dua_xlsx` 
	CHARACTER SET latin1
	FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\r\n' 
	IGNORE 1 LINES;
SELECT COUNT(*) FROM dua_xlsx;

xlsx2csv.ps

Install-Module -Name ImportExcel
Import-Module ImportExcel
$in = '.\Trabajada - Importaciones Formulas & Suplementos v8.xlsx'
$out = $env:TMP + '\dua_xlsx.csv'
Import-Excel -Path $in -WorksheetName Data -StartColumn 1 -EndColumn 33 -NoHeader | ConvertTo-Csv -NoTypeInformation | Select-Object -Skip 1 | Set-Content $out

Use UNIX file command to get the file encoding charset. scoop install file
... -Encoding UNICODE encodes to Little-endian UTF-16 Unicode charset
... -Encoding ASCII (default) encodes to Windows codepage 1252 charset which is equivalent to MySQL's latin1 charset