Getting started with mysql under node

First you should have mysql installed. (I am binary installed version 5.5)

Start the service (without starting the service database is not available):

First enter the installation directory, mine is:

cd /usr/local/mysql

 Then:

sudo ./support-files/mysql.server start

 Replace start with restart to restart the service, and replace with stop to close the service.

Enter mysql in the terminal:

./bin/mysql -u root -p

 Where -u refers to logging in with a user name, my user name is root, -p is logging in with a password, and you are prompted to enter a password after pressing Enter.

When building the table, it is recommended to add character set = utf8 at the end (that is, set the character set encoding format to utf-8), which can support Chinese well.

Just create a new folder and create a new js file in it, for example, I am app.js

Install the module mysql in the current path

npm install mysql

Then write (paste) a small example in the js file, and modify it to see the effect.

example

var mysql = require('mysql');
var conn = mysql.createConnection({
    host: 'localhost',
    user: 'nodejs',
    password: 'nodejs',
    database: 'nodejs',
    port: 3306
});
conn.connect();

var insertSQL = 'insert into t_user(name) values("conan"),("fens.me")';
var selectSQL = 'select * from t_user limit 10';
var deleteSQL = 'delete from t_user';
var updateSQL = 'update t_user set name="conan update"  where name="conan"';

//delete
conn.query(deleteSQL, function (err0, res0) {
    if (err0) console.log(err0);
    console.log("DELETE Return ==> ");
    console.log(res0);

    //insert
    conn.query(insertSQL, function (err1, res1) {
        if (err1) console.log(err1);
        console.log("INSERT Return ==> ");
        console.log(res1);

        //query
        conn.query(selectSQL, function (err2, rows) {
            if (err2) console.log(err2);

            console.log("SELECT ==> ");
            for (var i in rows) {
                console.log(rows[i]);
            }

            //update
            conn.query(updateSQL, function (err3, res3) {
                if (err3) console.log(err3);
                console.log("UPDATE Return ==> ");
                console.log(res3);

                //query
                conn.query(selectSQL, function (err4, rows2) {
                    if (err4) console.log(err4);

                    console.log("SELECT ==> ");
                    for (var i in rows2) {
                        console.log(rows2[i]);
                    }
                });
            });
        });
    });
});

//conn.end();