nodeFunctionExample.js

global.loadTagInfo = (function (tagName, callback) {
	connection.query('SELECT `Id`, `Desc` FROM `Tags` WHERE `Name` = ?;', [tagName], function (err, row) {
		callback([JSON.stringify(row[0]['Id']), JSON.stringify(row[0]['Desc'])]);
	});
});

global.countTagMembers = (function (tagId, callback) {
	connection.query('SELECT COUNT(UserId) FROM `TagMembership` WHERE TagId = ?;', [tagId[0]], function (err, row) {
		callback(JSON.stringify(row[0]['COUNT(UserId)']));
	});
});

nodeNested.js

var Id = 1;
connection.query('SELECT Name FROM Tags WHERE Id = ?;', [Id], function(row) {
	connection.query('SELECT Desc FROM Products WHERE Name = ?;', [row], function(row) {
		connection.query('SELECT Desc FROM Product WHERE Desc = ?;', [row], function(row) {
			connection.query('SELECT Id FROM Products WHERE Desc = ?;', [row], function(row) {
				connection.query('SELECT Id FROM Enterprises WHERE = ?;', [row], function(row) {
 
				});
			});
		});
	});
});

nodeNestedFix.js

async.waterfall([
	function(callback){
       	loadTagInfo(tagName, function (queryResult) {
       		console.log(queryResult);
       		callback(null, queryResult.replace(/"/g, ""));
       	});
	},
	function(tagId, callback){
        countTagMembers(tagId, function (queryResult) {
        	console.log(queryResult);
        	callback(null, queryResult, tagId[1]);
        });
	}
], function (err, tagMembers, tagDesc) {
   console.log(tagMembers);
   console.log(tagDesc);
   res.send(tagMembers, tagDesc);
});