一、使用MSsql微軟官方npm包。好處微軟原生。弊端：支援不夠強大。

二、使用Edge npm 包，好處夠強大，C#有多強大，他就有多強大。弊端：不能跨平臺。如要跨平臺的等mono的支援吧，具體我也沒有太關注這個東西。

例項①MSsql微軟官方npm包（我同事預研的，直接copy過來了，偷懶。有亂碼，將據點吧）

npm install [email protected] 使用3X的版本4X的升級了 下面的用不了了。

var mssql = require('mssql');
var user = "sa",
    password = "123456",
    server = "127.0.0.1",
    database = "test";

/**
 * Ĭ��config����
 * @type {{user: string, password: string, server: string, database: string, options: {encrypt: boolean}, pool: {min: number, idleTimeoutMillis: number}}}
 */
var config = {
    user: user,
    password: password,
    server: server, // You can use 'localhost\\instance' to connect to named instance
    database: database,
    options: {
        encrypt: true // Use this if you're on Windows Azure
    },
    pool: {
        min: 0,
        idleTimeoutMillis: 3000
    }
};

/**
 * ��ʼ��config
 * @param user
 * @param password
 * @param server
 * @param database
 */
var initConfig = function (user, password, server, database) {
    config = {
        user: user,
        password: password,
        server: server, // You can use 'localhost\\instance' to connect to named instance
        database: database,
        options: {
            encrypt: true // Use this if you're on Windows Azure
        },
        pool: {
            min: 0,
            idleTimeoutMillis: 3000
        }
    }
};

/**
 * �ָ�Ĭ��config
 */
var restoreDefaults = function () {
    config = {
        user: user,
        password: password,
        server: server, // You can use 'localhost\\instance' to connect to named instance
        database: database,
        options: {
            encrypt: true // Use this if you're on Windows Azure
        },
        pool: {
            min: 0,
            idleTimeoutMillis: 3000
        }
    };
};

/**
 * ִ��ԭ��Sql
 * @param sql
 * @params ��������(��Ϊ�գ�Ϊ�ձ�ʾ���Ӳ���)
 * @param callBack(err,recordset)
 */
var querySql = function (sql, params, callBack) {
    var connection = new mssql.Connection(config, function (err) {
        var ps = new mssql.PreparedStatement(connection);
        if (params != "") {
            for (var index in params) {
                if (typeof params[index] == "number") {
                    ps.input(index, mssql.Int);
                } else if (typeof params[index] == "string") {
                    ps.input(index, mssql.NVarChar);
                }
            }
        }
        ps.prepare(sql, function (err) {
            if (err)
                console.log(err);
            ps.execute(params, function (err, recordset) {
                callBack(err, recordset);
                ps.unprepare(function (err) {
                    if (err)
                        console.log(err);
                });
            });
        });
    });
    restoreDefaults();
};

//querySql("select id as roleId,roleName from dbo.role","",function(err,recordset){
//   console.dir(recordset);
//});

/**
 * ��������ѯ
 * @param tableName ����
 * @param topNumber ǰtopNumber��
 * @param whereSql  whereSql
 * @param params    ��ѯ�������
 

②edge方式：

var edge = require('edge');
var sqlPath = "Data Source=127.0.0.1;Initial Catalog=test;Persist Security Info=True;User ID=sa;Password=123456;Connect Timeout=180;Pooling=False";
var helloWorld = edge.func(function () {/*
 async (input) => {
 string str = "2017-12-12 12:12:12";
 return str.Substring(0, 7);
 }
 */});

helloWorld('JavaScript', function (error, result) {
    if (error) throw error;
    console.log(result);
});

//var edge = require('edge');


var getInsuranceChannelType = edge.func('sql', {
    source: function () {/*
     select top 2 * from [InsuranceChannelType]
     */},
    connectionString: sqlPath
});
getInsuranceChannelType(null, function (error, result) {
    if (error) throw error;
    console.log(result);
    //console.log(result[0].ProductName);
    //console.log(result[1].ReorderLevel);
});
/*exports.findById = function (req, res, next) {
    getEmployeeById({ Id: req.params.id }, function (error, data) {
        if (error) {
            console.log(error);
            res.send(error.message);
        }
        if (data) {
            res.send(data);
        }
        else {
            var noData = [];
            res.send(noData);
        }
    });
}*/
var getTop10Products = edge.func('sql', {
    source: function () {/*
     select top 1 * from [InsuranceCompany]
     */
    },
    connectionString: sqlPath
});
getTop10Products(null, function (error, result) {
    if (error) throw error;
    console.log(result);
   //console.log(result[0].ProductName);
   // console.log(result[1].ReorderLevel);
});