import Npm from '@mdx/Npm.astro'; import Callout from '@mdx/Callout.astro'; import Prerequisites from "@mdx/Prerequisites.astro"; import CodeTabs from "@mdx/CodeTabs.astro"; import WhatsNextPostgres from "@mdx/WhatsNextPostgres.astro"; import Breadcrumbs from '@mdx/Breadcrumbs.astro'; import FileStructure from '@mdx/get-started/FileStructure.mdx'; import InstallPackages from '@mdx/get-started/InstallPackages.mdx'; import SetupEnv from '@mdx/get-started/SetupEnv.mdx'; import ConnectPlanetScale from '@mdx/get-started/mysql/ConnectPlanetScale.mdx'; import CreateTable from '@mdx/get-started/mysql/CreateTable.mdx'; import UpdateSchema from '@mdx/get-started/mysql/UpdateSchema.mdx'; import IntrospectMySQL from '@mdx/get-started/mysql/IntrospectMySQL.mdx'; import QueryPlanetScale from '@mdx/get-started/mysql/QueryPlanetScale.mdx'; import ApplyChanges from '@mdx/get-started/ApplyChanges.mdx'; import RunFile from '@mdx/get-started/RunFile.mdx'; import SetupConfig from '@mdx/get-started/SetupConfig.mdx'; import TransferCode from '@mdx/get-started/TransferCode.mdx'; # Get Started with Drizzle and PlanetScale in existing project - **dotenv** - package for managing environment variables - [read here](https://www.npmjs.com/package/dotenv) - **tsx** - package for running TypeScript files - [read here](https://tsx.is) - **PlanetScale** - MySQL database platform - [read here](https://planetscale.com) - **database-js** - PlanetScale serverless driver - [read here](https://github.com/planetscale/database-js) For this tutorial, we will use the `database-js` driver to make **HTTP** calls to the PlanetScale database. If you need to connect to PlanetScale through TCP, you can refer to our [MySQL Get Started](/docs/get-started/mysql-new) page #### Step 1 - Install **@planetscale/database** package #### Step 2 - Setup connection variables #### Step 3 - Setup Drizzle config file #### Step 4 - Introspect your database #### Step 5 - Transfer code to your actual schema file #### Step 6 - Connect Drizzle ORM to the database #### Step 7 - Query the database #### Step 8 - Run index.ts file #### Step 9 - Update your table schema (optional) #### Step 10 - Applying changes to the database (optional) #### Step 11 - Query the database with a new field (optional) ```typescript copy filename="src/index.ts" import 'dotenv/config'; import { eq } from 'drizzle-orm'; import { drizzle } from 'drizzle-orm/planetscale-serverless'; import { usersTable } from './db/schema'; async function main() { const db = drizzle({ connection: { host: process.env.DATABASE_HOST!, username: process.env.DATABASE_USERNAME!, password: process.env.DATABASE_PASSWORD!, }}); const user: typeof usersTable.$inferInsert = { name: 'John', age: 30, email: 'john@example.com', phone: '123-456-7890', }; await db.insert(usersTable).values(user); console.log('New user created!') const users = await db.select().from(usersTable); console.log('Getting all users from the database: ', users) /* const users: { id: number; name: string; age: number; email: string; phone: string | null; }[] */ await db .update(usersTable) .set({ age: 31, }) .where(eq(usersTable.email, user.email)); console.log('User info updated!') await db.delete(usersTable).where(eq(usersTable.email, user.email)); console.log('User deleted!') } main(); ```

planetscale-existing-project