By language · SQL

Do my SQL homework. Queries that return the right rows.

Q: Which database do you use?

The one your course uses. Dialects differ, so we test on the exact engine and version.

Q: Do you draw ER diagrams?

Yes, in the notation your course uses: Chen, crow’s foot or UML.

Q: Can you explain the query plans?

Optimization orders include EXPLAIN output with plain-English notes on each step.

Queries, schemas and database projects for PostgreSQL, MySQL, Oracle and SQL Server. Every query is tested against real sample data.

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Price cappedFrom $45Full refund if we’re late800+ students

See an example order

What we cover

Every part of SQL your course covers.

Queries

Joins and subqueries
GROUP BY and HAVING
Window functions
CTEs and recursive queries

Design

ER diagrams
Normalization to 3NF / BCNF
Keys and constraints
Indexes

Programming

Stored procedures
Triggers
Views
Transactions

Projects

Database design projects
Query optimization
Reporting
App + database integration

Example order

One SQL order, start to finish.

What the student uploaded, what came back, and how the price was set.

01The brief

Database SystemsUndergradDue in 48 hours

Top customers by quarterly revenue

Using the provided retail schema, return each quarter’s top 3 customers by revenue with their rank. Ties share a rank. Explain the query plan.

Requirements

Join customers, orders and order_items
Revenue per customer per quarter
Top 3 per quarter, ties share a rank
EXPLAIN output with notes

02The solution

top_customers.sql18 lines

1-- revenue per customer per quarter, then rank within each quarter

2WITH revenue AS (

3 SELECT c.customer_id, c.name,

4 date_trunc('quarter', o.order_date) AS quarter,

5 SUM(oi.qty * oi.unit_price) AS total

6 FROM customers c

7 JOIN orders o ON o.customer_id = c.customer_id

8 JOIN order_items oi ON oi.order_id = o.order_id

9 GROUP BY c.customer_id, c.name, quarter

10)

11SELECT quarter, name, total, rnk

12FROM (

13 SELECT *, DENSE_RANK() OVER (

14 PARTITION BY quarter ORDER BY total DESC) AS rnk

15 FROM revenue

16) ranked

17WHERE rnk <= 3

18ORDER BY quarter, rnk;

PostgreSQL 15 · 12 rows · 38 ms

03The explanation doc

explanation.pdf

Why a CTE

Revenue is computed once and named, so the ranking query reads like the question.

DENSE_RANK, not RANK

Ties share a rank and the next rank isn’t skipped, which is what “top 3 with ties” means.

The plan

A hash join on order_id dominates; an index on orders(customer_id) cuts it by about half.

04The price

AI predicted budget

$50–$95

Level · UndergradIncluded

Deadline · 48 hoursRush

Shown before any contact details were shared.

Final price from our team

$70

Delivered 4h early

How it works

From upload to predicted budget in under a minute.

The AI does one job: it predicts your price. A senior engineer reviews your files and sets the final number.

01
Step 1 of 4
Upload your files
Prompt, rubric, starter code, or a screenshot of the task. PDF, DOCX, ZIP, code or images, in any mix.
02
Step 2 of 4
The AI asks what’s missing
It confirms your due date, then asks up to 3 questions your files don’t answer. Each one has an “I don’t know” option.
03
Step 3 of 4
See your predicted budget
A price range appears right away. No email, no sign-up.
04
Step 4 of 4
A senior engineer confirms your price
Leave your email. Within 5 minutes you get one fixed price. It never goes above the top of your range.

No payment to get a price. You pay only after you accept the fixed price. If the AI can’t price your files, an engineer emails you a price instead.

Typical orders

Common SQL assignments and typical budgets.

Query set (10–20 questions)

$50–$120

Usually 1–2 days

typical range

ER diagram and normalization

$60–$140

Usually 2–3 days

typical range

Stored procedures and triggers

$80–$170

Usually 2–3 days

typical range

Full database design project

$150–$350

Usually 4–6 days

typical range

Your budget depends on your files, deadline and level. Upload them for your own prediction.

Guarantees

Every order is covered. In writing.

Full refund, in three cases

We miss your deadline. Your code still doesn’t meet your original brief after revisions. Or you cancel before an engineer starts.

Partial refunds, worked out in the open

Cancel after work starts, or keep part of the work: we refund the rest and show you how we worked it out first.

Refunds that move fast

We reply within 24 hours. Approved refunds go back to your card through Stripe within 2 business days.

Unlimited revisions for 14 days

We revise until it matches your original instructions. No fees.

Your price is capped

Your fixed price never goes above the top of your range.

How the cap works

NDA and privacy

Your name, school and files are never shared, sold or reused. Engineers never see your name or email.

Secure payment

Processed by Stripe. We never see or store your card details.

Read the full refund policyFree. No email needed.

FAQ

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Still have a question?

Email us any time. Support runs 24/7 and a real person replies.

team@domyprogramminghomework.io

Which database do you use?

The one your course uses. Dialects differ, so we test on the exact engine and version.

Do you draw ER diagrams?

Yes, in the notation your course uses: Chen, crow’s foot or UML.

Can you explain the query plans?

Optimization orders include EXPLAIN output with plain-English notes on each step.

Is the predicted budget the final price?

Not exactly, but it’s capped. Our team reviews your files and sends one fixed price before you pay anything, and it never goes above the top of your range.

What if you miss my deadline?

You get a full refund, back to your card through Stripe. It’s in our refund policy, in writing.

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