# security-rls-basics

> Row Level Security (RLS) enforces data access at the database level, ensuring users only see their own data.

- Source: https://doutorai.pt/en/components/skills__security-rls-basics
- Type: Skills
- Category: Databases
- Downloads: 0
- Site: Doutor AI (https://doutorai.pt/en) - AI tools for small businesses

An open-source community component, curated and adapted by Doutor AI.

## What it does and how to use it

A **skill** that teaches Claude Code to do databases tasks well. It is packaged knowledge the model uses whenever it is relevant.

1. Install the skill (command above).
2. In Claude Code, describe what you need - the skill turns on by itself when the context fits.
3. No commands to memorize: you talk in plain language and the skill does the rest.

## Install (Claude Code)

```bash
mkdir -p .claude/skills/security-rls-basics && curl -fsSL https://doutorai.pt/data/lib/skills__security-rls-basics.md -o .claude/skills/security-rls-basics/SKILL.md
```

Paste this command into the terminal, in your project folder, and the component installs automatically.

## Content

````
---
title: Enable Row Level Security for Multi-Tenant Data
impact: CRITICAL
impactDescription: Database-enforced tenant isolation, prevent data leaks
tags: rls, row-level-security, multi-tenant, security
---

## Enable Row Level Security for Multi-Tenant Data

Row Level Security (RLS) enforces data access at the database level, ensuring users only see their own data.

**Incorrect (application-level filtering only):**

```sql
-- Relying only on application to filter
select * from orders where user_id = $current_user_id;

-- Bug or bypass means all data is exposed!
select * from orders;  -- Retu

- 🔒 Full content on the Pro plan (€7.99/month) -
````

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Content by Doutor AI (https://doutorai.pt/en). When quoting, please cite the source: https://doutorai.pt/en/components/skills__security-rls-basics