> For the complete documentation index, see [llms.txt](https://clear.gitbook.io/project/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clear.gitbook.io/project/querying/low-level-sql.md).

# Writing low-level SQL

Under the hood, Clear offers a performant SQL query builder for `SELECT`, `INSERT` and `DELETE` clauses:

 Under the hood, the

```ruby
Clear::SQL.select.from("users").execute # SELECT * FROM users;
```