add sqlite demo

src/database/sqlite/demo/demo.js

@@ -0,0 +1,62 @@
+const sqlite3 = require('sqlite3').verbose()
+
+var db = new sqlite3.Database('./user.db', sqlite3.OPEN_READWRITE, function (err) {
+    if (err) {
+        return console.log(err.message)
+    }
+    console.log('connect database successfully')
+})
+
+db.serialize(function () {
+    db.run('CREATE TABLE user(name text)', function (err) {
+        if (err) {
+            return console.log(err)
+
+        }
+        console.log('create table user')
+    })
+
+
+    db.run('INSERT INTO user(name) VALUES(?), (?)', ['Alice', 'Jack'], function (err) {
+        if (err) {
+            return console.log('insert data error: ', err.message)
+        }
+        console.log('insert data: ', this)
+    })
+
+    db.all('SELECT name FROM user WHERE name = ?', ['Alice'], function (err, rows) {
+        if (err) {
+            return console.log('find Alice error: ', err.message)
+        }
+
+        console.log('find Alice: ', rows)
+    })
+
+    db.run('UPDATE user SET name = ? WHERE name = ?', ['Alin', 'Alice'], function (err) {
+        if (err) {
+            return console.log('update data error: ', err.message)
+        }
+        console.log('update data: ', this)
+    })
+
+    db.all('SELECT * FROM user', [], function (err, rows) {
+        if (err) {
+            return console.log('find error: ', err)
+        }
+        console.log('find updated data', rows)
+    })
+
+    db.run('DELETE FROM user WHERE name = ?', ['Alin'], function (err) {
+        if (err) {
+            return console.log(err.message)
+        }
+        console.log('deleted Alin: ', this)
+    })
+})
+
+db.close(function (err) {
+    if (err) {
+        return console.log(err.message)
+    }
+    console.log('close database connection')
+})