I know it would be too late to answer this but would help for people who are looking for formatting number with fixed decimal as 2.
You can define your custom function by adding to alasql.fn object as below
alasql.fn.precise_round = function (num, dec) {
if ((typeof num !== 'number') || (typeof dec !== 'number'))
return false;
console.log(num);
var num_sign = num >= 0 ? 1 : -1;
return (Math.round((num * Math.pow(10, dec)) + (num_sign * 0.0001)) / Math.pow(10, dec)).toFixed(dec);
}
alasql.fn.numberWithCommas = function (num) {
return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}
You can now use this function inside your alasql select query
var data = alasql("SELECT INTO XLSX precise_round(column_name) from ?", [objData]);
alasql("SELECT INTO XLSX('Test.xlsx', { headers: true}) FROM ?", [data]);
Assuming one of your column in objData holds numbers including 0 as well which is output as 0.00 as per your requirement