Node.js MySQL 排序
排序结果
使用 ORDER BY 语句按升序或降序对结果进行排序。
默认情况下，ORDER BY 关键字按升序对结果进行排序。要按降序对结果进行排序，请使用 DESC 关键字。
示例
按名称按字母顺序排序结果
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "yourusername",
password: "yourpassword",
database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
con.query("SELECT * FROM customers ORDER BY name", function (err, result) {
if (err) throw err;
console.log(result);
});
});
运行示例 »
将以上代码保存到名为“demo_db_orderby.js”的文件中并运行该文件
运行“demo_db_orderby.js”
C:\Users\您的姓名>node demo_db_orderby.js
这将为您提供以下结果
[
{ id: 3, name: 'Amy', address: 'Apple st 652'},
{ id: 11, name: 'Ben', address: 'Park Lane 38'},
{ id: 7, name: 'Betty', address: 'Green Grass 1'},
{ id: 13, name: 'Chuck', address: 'Main Road 989'},
{ id: 4, name: 'Hannah', address: 'Mountain 21'},
{ id: 1, name: 'John', address: 'Higheay 71'},
{ id: 5, name: 'Michael', address: 'Valley 345'},
{ id: 2, name: 'Peter', address: 'Lowstreet 4'},
{ id: 8, name: 'Richard', address: 'Sky st 331'},
{ id: 6, name: 'Sandy', address: 'Ocean blvd 2'},
{ id: 9, name: 'Susan', address: 'One way 98'},
{ id: 10, name: 'Vicky', address: 'Yellow Garden 2'},
{ id: 14, name: 'Viola', address: 'Sideway 1633'},
{ id: 12, name: 'William', address: 'Central st 954'}
]
ORDER BY DESC
使用 DESC 关键字按降序对结果进行排序。
示例
按名称反向字母顺序排序结果
var mysql = require('mysql');
var con = mysql.createConnection({
host: "localhost",
user: "yourusername",
password: "yourpassword",
database: "mydb"
});
con.connect(function(err) {
if (err) throw err;
con.query("SELECT * FROM customers ORDER BY name DESC", function (err, result) {
if (err) throw err;
console.log(result);
});
});
运行示例 »
将以上代码保存到名为“demo_db_orderby_desc.js”的文件中并运行该文件
运行“demo_db_orderby_desc.js”
C:\Users\您的姓名>node demo_db_orderby_desc.js
这将为您提供以下结果
[
{ id: 12, name: 'William', address: 'Central st 954'},
{ id: 14, name: 'Viola', address: 'Sideway 1633'},
{ id: 10, name: 'Vicky', address: 'Yellow Garden 2'},
{ id: 9, name: 'Susan', address: 'One way 98'},
{ id: 6, name: 'Sandy', address: 'Ocean blvd 2'},
{ id: 8, name: 'Richard', address: 'Sky st 331'},
{ id: 2, name: 'Peter', address: 'Lowstreet 4'},
{ id: 5, name: 'Michael', address: 'Valley 345'},
{ id: 1, name: 'John', address: 'Higheay 71'},
{ id: 4, name: 'Hannah', address: 'Mountain 21'},
{ id: 13, name: 'Chuck', address: 'Main Road 989'},
{ id: 7, name: 'Betty', address: 'Green Grass 1'},
{ id: 11, name: 'Ben', address: 'Park Lane 38'},
{ id: 3, name: 'Amy', address: 'Apple st 652'}
]
