Run commands
The agent runs your database client and saves the output.
Product
sql practice problems solved locally
01
NullReed helps you with sql practice exercises by running commands and showing real results on your Windows PC.
Check diffs
Edit your query and see exactly what changed in the file.
Plan steps
Write a plan and review it before any data changes occur.
Features
- Filesread, write, edit, delete, move, copy, list, grep, and glob files in your working folder.
- Shellrun terminal commands, build tools, linters, and tests with real exit codes reported.
- Websearch the web or fetch official documentation pages using standard HTTP requests.
- Screenshots and imagesgenerate image files or read text from screenshots using OCR.
- Orchestrationuse parallel sub-agents, send hard steps to bigger models, or run skills.
- Approval modesAuto-run, Ask first, Plan only. Plans survive restarts for your review.
- Cronschedule prompts to run at specific times automatically on your computer.
- Modelsuse a cloud provider, a local model, or the built-in model without extra setup.
How it works
You stay in control of your practice data and exercises.
Correct the GROUP BY clause in my join query.
- read_file
exercises.sqlloaded - edit_file
exercises.sqlsaved - Shell
db-cli -f exercises.sqlexit 0 - grep
COUNT2 lines - read_file
output.txtloaded
waiting for your OK before the next stepRejectAccept
Walkthroughs
Join practice
NullReed creates a seed script with employees and departments tables using write_file, and the agent edits the join query in exercises.sql to show non-matching rows. Ask first pauses. The agent runs the SQL client via Shell and saves the output. You review the diff before accepting the change to ensure accuracy. Comparing the result with the expected answer helps you understand sql practice problems. How to learn sql from beginning involves creating a practice database. The agent compares your output with the expected result to explain differences. NullReed is an autonomous AI agent for Windows 10/11, current version 2.9.26.
Group by fix
You begin with a query that groups by the wrong column, and the agent reads the file to suggest a correction while you wait. Approval is required. You approve the edit in Ask first mode to ensure safety. The agent runs the command and checks the exit code. You review the text output to confirm the counts are correct. This workflow supports sql practice exercises by showing practical steps. Many users ask if sql beginner friendly for those starting out. The portable exe size is about 25 MB for easy use.
What NullReed does not do
NullReed is a desktop app, not a hosted service; practise only on made-up data in a database on your own PC; the agent does not enforce scope; results can be wrong, so read the diff and test, while focusing on the important concepts to learn in sql.
