![]() ![]() In this tutorial, you have learned how to connect to an SQLite database either in-memory or disk file based database. Note that you will learn how to query data in the next tutorial. So you now can open an SQLite database and provide the detailed information if an error occurred as follows: let db = new sqlite3.Database( ':memory:', (err) => ) Code language: JavaScript ( javascript ) In case the database is opened successfully, the open event is emitted regardless of whether a callback is provided or not. If you don’t provide the callback function and an error occurred during opening the database, an error event will be emitted. One last step: in the package.json file that was created for you, make sure to add the field 'type': 'module' as a property. Then, open the terminal and create one directory which will be dedicated for our project. The first will give us access to a Node.js driver for SQLite (what we'll use to connect to the database in our code), while the second will help us generate some test data to insert into our database. If an error occurred, the error object is not null, otherwise, it is null. Step 1:First of all, make sure that you have Node.js and SQLite3 installed in your local machine. The callback function has the error object as the first parameter. The sqlite3.Database() accepts a callback function that will be called when the database opened successfully or when an error occurred. The sqlite3.Database() returns a Database object and opens the database connection automatically. Second, create a Database object: let db = new sqlite3.Database( ':memory:') Code language: JavaScript ( javascript ) Notice that the execution mode is set to verbose to produce long stack traces. To open a database connection to an in-memory database, you use the following steps.įirst, import the sqlite3 module: const sqlite3 = require( 'sqlite3').verbose() Code language: JavaScript ( javascript ) Second, call the Database() function of the sqlite3 module and pass the database information such as database file, opening mode, and a callback function.To connect to an SQLite database, you need to: You can use npm to do so using the following command: > npm install sqlite3 Code language: JavaScript ( javascript )Īfter installing the sqlite3 module, you are ready to connect to an SQLite database from a Node.js application. To interact with the SQLite database, you need to download and install sqlite3 module. Deleting data from a table – show you how to delete data from a table.Summary: in this tutorial, you will learn how to connect to an SQLite database from Node.js applications.Updating data – covers the steps of updating data in a table. ![]() Inserting data into a table – shows you how to insert one or more rows into a table.Controlling the execution flow of statements – explains the steps of executing multiple SQL statements in serialized mode or in parallel mode.The two technologies work well together because developers can easily embed SQLite databases within a Node.js application. SQLite is a lightweight, self-contained database popular for its ease of use and portability. Querying data from tables – introduces you to various methods for querying data from tables. Node.js is a JavaScript runtime environment that allows you to build server-side applications.Connecting to an SQLite3 database – shows you how to connect to an in-memory database or a file-based database.To understand how the sqlite3 module works, you can use the following tutorials in sequence: Control the query execution flow, supporting both serialized and parallel modes.The sqlite3 module is actively maintained and provides a rich set of features: In addition, you will learn how to execute SQL statements in serialized mode or in parallel mode. After the tutorial, you will know how to open a database connection and perform common database operations such as select, insert, update, and delete. In this section, you will learn how to interact with SQLite databases from a Node.js application using the sqlite3 module.
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