Wait! Before you go...
Your slow query, diagnosed.
Send me one query. I'll tell you what's wrong with it and how to fix it.
A personal async performance review, delivered within 5 business days.
You've got a query that's slow. Maybe it works fine on a small dataset but is slow in production. Maybe you've already tried adding an index and it didn't help. Maybe you've stared at the execution plan and you're still not sure what you're looking at.
You know something's wrong. You're just not sure what.
That's what this is for.
I'll personally review your query.
You send me your query and some information about your tables. Then, I'll analyse it, record a personal video walkthrough explaining exactly what's causing the performance problem, and send you a written summary.
You get a clear answer. Not a general tip. Not "try adding an index." A specific diagnosis of your specific query.
What You Submit
When you purchase, you'll get an email with instructions. You'll share:
- Your slow SQL query (and SQL vendor you're working with, such as SQL Server)
- Your schema for the relevant tables (a diagram, or even a plain-text description of how the tables relate)
- The approximate row counts for each table involved.
That's it. No call or meeting required.
What You Get Back
Within 5 business days, I'll send you:
- A personal screen recording video, walking you through your query, what the performance problem likely is, and why it's happening.
- A written summary of the key findings and recommended fixes, so you have something to refer back to when you go and make the changes.
One query. One review. Delivered within 5 business days.
Your price today, as a customer:
After you purchase, you'll receive an email with the next steps, including how to provide the details of the query and the database.
Provide the details at your own pace. I'll be in touch to then review your query and provide the video and written summary.
"A good investment"
"Your Write Faster SQL course is a good investment. The approach is interesting in that you are showing the same lessons against 4 different database engines. That helps developers understand the bigger picture rather than just âhow toâ for their most common/only database"
- Doug T, course student
"Reduced our cloud costs"
"After the Database Star training, I did identify all the worst running queries on my production databases and fixed them and that reduced our cloud costs."
- David B, course student
"Best training material on SQL anywhere"
"Itâs the best training material on SQL anywhere. You have a rare gift for making the complex simple. Thank you for all you do!"
- Brad C, course student
A Note on Availability
I take on a small number of reviews each week to make sure each one gets proper attention.
If spots are currently full, you'll be notified when a new slot opens.
Who This Is For
This is for developers and analysts who have a specific query that's causing a real performance problem and want a clear, honest answer about what's going wrong.
It's not a general SQL course. It's not a coaching call. It's a focused look at your query, with a personal response from someone who's been diagnosing slow queries for years.
What About Confidentiality?
Everything you share with me stays between us.
I don't share queries, schemas, or any submission details with anyone. If your company's privacy and intellectual property policies are a concern, you're welcome to anonymise your table and column names before submitting. The diagnosis doesn't depend on them being real.
One query. One review. Delivered within 5 business days.
Your price today, as a customer:
Frequently Asked Questions
What if my query is too complex?
Complex queries are usually the most interesting to diagnose. As long as you can share the query, the schema, and the row counts, I have what I need.
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What database do you support?
I work with Oracle, SQL Server, MySQL, and PostgreSQL. If your query is from one of those databases, I can accept it.
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What if the problem turns out to be something other than the query itself?
This can happen sometimes, and if so, I'll say so and explain what to look at instead.
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Can I submit more than one query?
This review covers one query per purchase. If you have multiple slow queries, you're welcome to purchase again.
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What if I'm not happy with the review? Or what if your review does not actually help my query?
If the diagnosis isn't useful, get in touch and I'll do my best to make it right.
