Trace  Hoeger

Trace Hoeger

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Compare MySQL Vs PostgreSQL Vs SQLite Proficient

In this article, we first introduce MySQL, PostgreSQL, and SQLite. We explain their pros and cons. We compare them and indicate when one should use them. Additionally, we talk about the differences between self-hosted vs cloud databases. Finally, we provide brief overviews of a few popular licensed and cloud-based RDBMS solutions. Read on. 
#sqlite #postgresql #mysql 

Compare MySQL Vs PostgreSQL Vs SQLite Proficient

Build a RestfulAPI using Express, Prisma ORM for JavaScript and TypeScript

In this video, we will be making a RestfulAPI using Express and Prisma ORM for JavaScript and TypeScript. We would be doing all the basic CRUD operations on our database of choice (PostgreSQL, MySQL, SQLite or even MongoDB). For this video we will be using SQLite as the Database. The application will be based on restful principles (GET, POST, PUT, PACTH, DELETE).

After watching this video you will have a basic idea of how to use Prisma ORM with ease.

0:00  Introduction
0:24  Express draft
3:06  Product-Category relationship
3:58  Install Prisma
5:00  setup prisma
8:48  Product Model
11:52 Category Model
12:34  One-Many Relationship
14:42  RestAPI routes
15:56 Prisma Studio (GUI for Database)
16:42  prisma migrate
19:45  prisma client init
20:44 GET all products
23:35 include relation in responses
26:58 POST create a product
32:46 GET a product by Id
35:55 DELETE a product by Id
38:11  PATCH a product by Id
43:01  Modifying Models and using prisma generate (adding more fields/columns)
46:42 Conclusion

#node #express #javascript #prisma #api #postgresql #mysql #sqlite #mongodb #batabase #webdev #typescript

 

Build a RestfulAPI using Express, Prisma ORM for JavaScript and TypeScript

Storage Extension for The Stash Caching API

stash_sqlite

A stash storage extension for sqlite using the moor package

Overview

This storage extension for stash provides a storage layer through the moor persistent library and relies on a highly performing binary serialization of the cache items through the use of msgpack serialization format. This storage backend is particularly optimized to support stash features, like expiration and eviction which are highly dependent on the update of control fields on the cache entries upon user operations. On this storage backend the update of those fields does not cause the update of the whole cache entry as some of the other storage implementations like stash_hive or stash_sembast since they are stored in specific columns on the relational database model.

Getting Started

Add this to your pubspec.yaml (or create it) replacing x.x.x with the latest version of stash_sqlite:

dependencies:
    stash_sqlite: ^x.x.x

Run the following command to install dependencies:

dart pub get

Finally, to start developing import the library:

import 'package:stash_sqlite/stash_sqlite.dart';

Usage

The example bellow creates two caches with a shared sqlite storage backend. In this rather simple example the serialization and deserialization of the object is coded by hand but it's more usual to rely on libraries like json_serializable. Please take a look at the documentation of stash to gather additional information and to explore the full range of capabilities of the stash library

import 'dart:io';

import 'package:stash/stash_api.dart';
import 'package:stash_sqlite/stash_sqlite.dart';

class Task {
  final int id;
  final String title;
  final bool completed;

  Task({required this.id, required this.title, this.completed = false});

  /// Creates a [Task] from json map
  factory Task.fromJson(Map<String, dynamic> json) => Task(
      id: json['id'] as int,
      title: json['title'] as String,
      completed: json['completed'] as bool);

  /// Creates a json map from a [Task]
  Map<String, dynamic> toJson() =>
      <String, dynamic>{'id': id, 'title': title, 'completed': completed};

  @override
  String toString() {
    return 'Task $id: "$title" is ${completed ? "completed" : "not completed"}';
  }
}

void main() async {
  // Temporary directory
  final dirPath = Directory.systemTemp;
  // Temporary database file for a shared store
  final file = File('${dirPath.path}/stash_sqlite.db');

  // Creates a store
  final store = newSqliteFileStore(
      file: file, fromEncodable: (json) => Task.fromJson(json));
  // Creates a cache with a capacity of 10 from the previously created store
  final cache1 = store.cache(
      cacheName: 'cache1',
      maxEntries: 10,
      eventListenerMode: EventListenerMode.synchronous)
    ..on<CreatedEntryEvent>().listen(
        (event) => print('Key "${event.entry.key}" added to the first cache'));
  // Creates a second cache with a capacity of 10 from the previously created store
  final cache2 = store.cache(
      cacheName: 'cache2',
      maxEntries: 10,
      eventListenerMode: EventListenerMode.synchronous)
    ..on<CreatedEntryEvent>().listen(
        (event) => print('Key "${event.entry.key}" added to the second cache'));

  // Adds a task with key 'task1' to the first cache
  await cache1.put('task1',
      Task(id: 1, title: 'Run shared store example (1)', completed: true));
  // Retrieves the value from the first cache
  print(await cache1.get('task1'));

  // Adds a task with key 'task1' to the second cache
  await cache2.put('task1',
      Task(id: 2, title: 'Run shared store example (2)', completed: true));
  // Retrieves the value from the second cache
  print(await cache2.get('task1'));
}

Features and Bugs

Please file feature requests and bugs at the issue tracker.

License

This project is licensed under the MIT License - see the LICENSE file for details

Use this package as a library

Depend on it

Run this command:

With Dart:

 $ dart pub add stash_sqlite

With Flutter:

 $ flutter pub add stash_sqlite

This will add a line like this to your package's pubspec.yaml (and run an implicit dart pub get):

dependencies:
  stash_sqlite: ^3.2.1

Alternatively, your editor might support dart pub get or flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:stash_sqlite/stash_sqlite.dart'; 

example/example.dart

import 'dart:io';

import 'package:stash/stash_api.dart';
import 'package:stash_sqlite/stash_sqlite.dart';

class Task {
  final int id;
  final String title;
  final bool completed;

  Task({required this.id, required this.title, this.completed = false});

  /// Creates a [Task] from json map
  factory Task.fromJson(Map<String, dynamic> json) => Task(
      id: json['id'] as int,
      title: json['title'] as String,
      completed: json['completed'] as bool);

  /// Creates a json map from a [Task]
  Map<String, dynamic> toJson() =>
      <String, dynamic>{'id': id, 'title': title, 'completed': completed};

  @override
  String toString() {
    return 'Task $id: "$title" is ${completed ? "completed" : "not completed"}';
  }
}

void main() async {
  // Temporary directory
  final dirPath = Directory.systemTemp;
  // Temporary database file for a shared store
  final file = File('${dirPath.path}/stash_sqlite.db');

  // Creates a store
  final store = newSqliteFileStore(
      file: file, fromEncodable: (json) => Task.fromJson(json));
  // Creates a cache with a capacity of 10 from the previously created store
  final cache1 = store.cache(
      cacheName: 'cache1',
      maxEntries: 10,
      eventListenerMode: EventListenerMode.synchronous)
    ..on<CreatedEntryEvent>().listen(
        (event) => print('Key "${event.entry.key}" added to the first cache'));
  // Creates a second cache with a capacity of 10 from the previously created store
  final cache2 = store.cache(
      cacheName: 'cache2',
      maxEntries: 10,
      eventListenerMode: EventListenerMode.synchronous)
    ..on<CreatedEntryEvent>().listen(
        (event) => print('Key "${event.entry.key}" added to the second cache'));

  // Adds a task with key 'task1' to the first cache
  await cache1.put('task1',
      Task(id: 1, title: 'Run shared store example (1)', completed: true));
  // Retrieves the value from the first cache
  print(await cache1.get('task1'));

  // Adds a task with key 'task1' to the second cache
  await cache2.put('task1',
      Task(id: 2, title: 'Run shared store example (2)', completed: true));
  // Retrieves the value from the second cache
  print(await cache2.get('task1'));
} 

Download Details:

Author: ivoleitao

Source Code: https://github.com/ivoleitao/stash/tree/develop/packages/stash_sqlite

#dart #sqlite

Storage Extension for The Stash Caching API

SQLite Project Android App - Kotlin Lesson 9

In this video tutorial, we made a sample project that teaches how to save data using SQLite. If you watch the video until the end, you will learn in detail about SQLite, which is often used as a data saving method while developing Android Apps.

Source codes : https://l24.im/7BMlCV

In this tutorial playlist, we learn in detail how we can develop android apps using kotlin. If you watch all the videos of the android app development playlist in order, you will be able to make your own android apps at the end of the playlist.

#kotlin #sqlite

SQLite Project Android App - Kotlin Lesson 9
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In This Tutorial, learn about How to android SQLite Database Read Fluently PART 2

#sqlite #android

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In This Tutorial, learn about Android SQLite Database Insert Tutorial fluently

#sqlite #android studio

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This tutorial explains you the usage and implementation of local database i.e., SQFLite in flutter

Code Link : http://www.androidcoding.in/2020/07/17/flutter-sqlite/

Join Flutter Group : https://www.facebook.com/groups/273290910590819/
Android - Kotlin Complete Course:
Kotlin Introduction : https://youtu.be/2_EXYeKVX3g
Kotlin Variables & Data Types : https://youtu.be/bevfj0pFH6Q
Kotlin If-Conditions : https://youtu.be/8r0TMiKLwGo
Kotlin When Condition (Switch) : https://youtu.be/oQ3rXxU2bK4
Kotlin For Loop : https://youtu.be/10uMCFiUDNU
Kotlin While & Do-While Loop : https://youtu.be/nXStQ8WFCT0

#flutter #sqlite

Flutter SQLite Implementation| SQFLite | Local Database | flutter coding
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#sqlite #sql #python

Master Using SQL with Python:  Lesson 2 - Using SQLite
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How to Use Select Query in SQLite Database Python | Python Built-In Database - V

Querying Data - Python Built-In Database - SQLite.

Github - https://github.com/theindianinnovation/Python-SQLite-Database-Tutorial

#python #database #sqlite database python #query #sqlite #sqlite database

How to Use Select Query in SQLite Database Python | Python Built-In Database - V
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Insert Records - Python Built-In Database - SQLite.

Github - https://github.com/theindianinnovation/Python-SQLite-Database-Tutorial

#database #python #sqlite database python #sqlite #database python

How to Insert Records in SQLite Database Python | Python Built-In Database - IV
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Create Table - Python Built-In Database - SQLite.

Github - https://github.com/theindianinnovation/Python-SQLite-Database-Tutorial

#sqlite #database #python #sqlite database python #database python

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Import and Usage - Python Built-In Database - SQLite.

Github - https://github.com/theindianinnovation/Python-SQLite-Database-Tutorial

#python #sqlite database #database #sqlite

How to Create Connection in SQLite Database | Python Built-In Database - II
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Introduction - Python Built-In Database - SQLite.

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#sqlite #python #database #sqlite introduction #sqlite database

What is SQLite Database | SQLite Introduction | Python Built-In Database - I
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Deploy no Heroku - Flask + SQLite ou PostgreSQL | Tutorial

Nesse vídeo vamos subir um projeto Flask no Heroku!

Repositório no GitHub do Projeto BlueMusic: https://github.com/codethi/BlueMusicV2

01:52 Repositório Git no VsCode
04:05 O que é o Heroku
06:48 Instalando o Heroku
07:57 Criando uma conta no Heroku
09:06 Instalando o gunicorn
10:23 Criação do arquivo Procflie
11:41 Criação do arquivo requirements.txt
12:53 Repositório local e remoto
13:43 Repositóro remoto do Heroku
14:25 Heroku Login
15:45 Criação do app no Heroku
16:51 Subindo o projeto no Heroku
17:42 O que foi feito no deploy
18:27 Abrindo a aplicação no navegador
19:38 Explorando o dashboard no Heroku
20:02 Apagando o app no Heroku
20:47 Atualizando o projeto no Heroku
23:24 Instalando o PostgreSQL no Heroku

#heroku #flask #python #sqlite #postgresql #tutorial

Deploy no Heroku - Flask + SQLite ou PostgreSQL | Tutorial
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Beth Cooper

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In this playlist, we are going to learn How to Create a Simple Flutter SqfLite TodoList App. At the moment I don’t use a lot of layout.

#flutter #sqlite #todolist #androidstudio #todolist app

18 Show Todos Item By Category - Flutter Sqflite TodoList App Tutorial