alasql/test/test196.js

AlaSQL.js - JavaScript SQL database library for relational and graph data manipulation with support of localStorage, IndexedDB, and Excel

if(typeof exports === 'object') {
	var assert = require("assert");
	var alasql = require('..');
} else {
	__dirname = '.';
};

//if(typeof exports != 'object') {

describe('Test 196 - COUNT(a) vs COUNT(*)', function() {

//    console.log(alasql.parse('SELECT a FROM ? GROUP BY a % 2').toString());

    it("1. COUNT(*) vs COUNT(a)", function(done) {
        var data = [{a:1},{a:1},{a:2},{a:3},{a:1},{a:2},{a:undefined}];
        var res = alasql('SELECT a, COUNT(*) as b, COUNT(a) as c FROM ? GROUP BY a',[data]);
        assert.deepEqual(res,[ { a: 1, b: 3, c: 3 },
            { a: 2, b: 2, c: 2 },
            { a: 3, b: 1, c: 1 },
            { a: undefined, b: 1, c: 0 } ]);
//        console.log(res);
    	done();
    });
    
    it("2. COUNT(DISTINCT a)", function(done) {
        var data = [{a:1},{a:1},{a:2},{a:3},{a:1},{a:2}];
        var res = alasql('SELECT COUNT(DISTINCT a) FROM ?',[data]);
//        console.log(res);
        done();
    });
});