import Tab from '@mdx/Tab.astro'; import Tabs from '@mdx/Tabs.astro'; import Npm from "@mdx/Npm.astro"; import Callout from '@mdx/Callout.astro'; import Steps from '@mdx/Steps.astro'; import AnchorCards from '@mdx/AnchorCards.astro'; import Breadcrumbs from '@mdx/Breadcrumbs.astro'; import CodeTabs from "@mdx/CodeTabs.astro"; import Prerequisites from "@mdx/Prerequisites.astro"; import IntrospectPostgreSQL from '@mdx/get-started/postgresql/IntrospectPostgreSQL.mdx'; import FileStructure from '@mdx/get-started/FileStructure.mdx'; import InstallPackages from '@mdx/get-started/InstallPackages.mdx'; import SetupConfig from '@mdx/get-started/SetupConfig.mdx'; import SetupEnv from '@mdx/get-started/SetupEnv.mdx'; import TransferCode from '@mdx/get-started/TransferCode.mdx'; import ApplyChanges from '@mdx/get-started/ApplyChanges.mdx'; import RunFile from '@mdx/get-started/RunFile.mdx'; import ConnectVercel from '@mdx/get-started/postgresql/ConnectVercel.mdx' import QueryDatabase from '@mdx/get-started/QueryDatabase.mdx'; import QueryDatabaseUpdated from '@mdx/get-started/QueryDatabaseUpdated.mdx'; import UpdateSchema from '@mdx/get-started/postgresql/UpdateSchema.mdx'; # Get Started with Drizzle and Vercel Postgres 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/) - **Vercel Postgres database** - [read here](https://vercel.com/docs/storage/vercel-postgres) - **Vercel Postgres driver** - [read here](https://vercel.com/docs/storage/vercel-postgres/sdk) & [GitHub](https://github.com/vercel/storage/tree/main/packages/postgres) #### Step 1 - Install required package #### Step 2 - Setup connection variables It's important to name the variable `POSTGRES_URL` for Vercel Postgres. In the Vercel Postgres storage tab, you can find the `.env.local` tab and copy the `POSTGRES_URL` variable #### 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 ```typescript copy filename="src/index.ts" import 'dotenv/config'; import { eq } from 'drizzle-orm'; import { drizzle } from 'drizzle-orm/vercel-postgres'; import { usersTable } from './db/schema'; async function main() { const db = drizzle(); const user: typeof usersTable.$inferInsert = { name: 'John', age: 30, email: 'john@example.com', }; await db.insert(usersTable).values(user); console.log('New user created!') const users = await db.select().from(usersTable); console.log('Getting all users from the database: ', users) /* const users: { id: number; name: string; age: number; email: string; }[] */ await db .update(usersTable) .set({ age: 31, }) .where(eq(usersTable.email, user.email)); console.log('User info updated!') await db.delete(usersTable).where(eq(usersTable.email, user.email)); console.log('User deleted!') } main(); ``` #### Step 8 - Run index.ts file #### Step 9 - Update your table schema (optional) #### Step 10 - Applying changes to the database (optional) #### Step 11 - Query the database with a new field (optional) ```typescript copy filename="src/index.ts" import 'dotenv/config'; import { eq } from 'drizzle-orm'; import { drizzle } from 'drizzle-orm/vercel-postgres'; import { usersTable } from './db/schema'; async function main() { const db = drizzle(); const user: typeof usersTable.$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(); ```

vercel-postgres-existing-project