I had an excel file that I managed to read in the NodeJS, here is the excel format:

I have no header, only 4 columns. And the code I used is the following:

const { Client } = require("pg");
const xlsx = require("node-xlsx");

var data = xlsx.parse(__dirname + "/disease_data.xlsx");

var diseaseCode = [];
var disease = [];
var symptomCode = [];
var symptom = [];

const client = new Client({
  host: "localhost",
  user: "postgres",
  port: 5432,
  password: "dizertatie",
  database: "SymptomChecker",
});

client.connect();

for (var i = 0; i < data.length; i++) {
    var sheet = data[i];
    console.log(sheet["data"][i][1]);
    for (var j = 0; j < sheet["data"].length; j++) {
      //add the row to the rows array
      // diseaseCode.push(sheet["data"][j][0]);
      //Here is the problem
      client.query(`INSERT INTO diseases (diseaseCode, disease, symptomCode, symptom) VALUES ('${}')`)
    }
}

The problem is, I managed to stack each column from the excel into different arrays, but I don't know to push them corresponding line by line. What can I do?