Writing a Good Technical Blog Post

A useful technical post answers the question a reader typed into search. A technical blog post earns trust by showing one problem, a tested answer, clear code, and the conditions where that answer stops working.

Choose One Reader Problem for Each Technical Blog Post

State the symptom or task in the first paragraph. A post about a failed restore should not become a general tour of every backup option. Name the SQL Server version or feature boundary when it matters. The reader wants to know whether the article applies before reading a long backstory.

I write the question in plain words before writing a title. What would the reader ask a colleague? If I cannot answer that in one sentence, the topic needs a narrower scope. A focused post can still include a useful edge case. It just does not need every related feature.

Build a Reproducible Example

Create a small table or sample query that demonstrates the issue without private data. Include setup, the action, and a check of the result. Keep identifiers and dates explicit. If a query needs a specific database or compatibility level, say so. The example should be safe to run in a test environment and easy to reset.

I test the code in a clean session, not only in the query window where I built it. Variables and temporary tables left from earlier work can make an incomplete example appear valid. A reader should not have to guess which statement ran before the code block.

Show the Expected Observation

Explain which output column or plan operator matters. Do not invent a timing or row count from a server you did not run. If a measured result is useful, capture it on your own test instance and state the environment. Otherwise give the query and tell the reader what to compare. An unverified benchmark is decoration.

The following query is a harmless example of a check. It tells the reader which database is active before any demonstration. I keep such context visible when a script can change data.

SELECT @@SERVERNAME AS connected_server,
       DB_NAME() AS current_database;

Make Technical Blog Post Code Easy to Copy

Use complete statements with clear object names and necessary batch separators. A CREATE PROCEDURE or CREATE VIEW statement needs its own batch before a test call. Label command-line or PowerShell blocks so the reader knows the language. Escape angle brackets correctly in HTML while leaving the SQL meaning intact. Avoid screenshots as the only source of code.

I copy every published block into a fresh editor during review. A missing backslash or alias can survive several readings and fail immediately when pasted. The code is part of the article, not an illustration that merely looks plausible.

Explain Why the Answer Works

Walk through the one rule that makes the solution correct. For a NOT EXISTS query, explain how the correlated key removes matched rows. For an index example, explain the predicate and the lookup cost. A reader should leave with a transferable idea, not just a snippet. Keep sentences short and the result close to the code.

This query is a compact example for explaining an anti-join. In a full post, the surrounding text would identify the table grain and expected unmatched rows.

SELECT c.CustomerId
FROM dbo.Customer AS c
WHERE NOT EXISTS
(
    SELECT 1
    FROM dbo.Orders AS o
    WHERE o.CustomerId = c.CustomerId
);

Include the Trap and the Limit

Show one edge case that can make a correct-looking answer fail. NULLs, duplicate keys, collation, concurrency, and version differences are common sources. Do not bury that limitation after a long list of unrelated warnings. Pick the one the reader is most likely to hit. Explain how to check for it.

I write the limit before the closing line. That keeps me from making a headline promise wider than the evidence. Which input would you use to challenge this solution? If I cannot name one, I have not tested enough.

Leave the Noise Out of a Technical Blog Post

Remove release announcements, expired offers, decorative tool lists, and unrelated history. Keep links only when they help the reader verify or complete the task and when the publication format permits them. A technical blog post does not need a paragraph proving that the author is enthusiastic about technology. The code and explanation can do that work.

I read the draft as someone who arrived with a failing query and little time. If a paragraph delays the answer without adding context, I cut it. A clear article feels generous because it respects the reader’s attention.

Before drafting, define the reader’s task in one sentence. A post about a slow query should say what evidence to collect, which decision it supports and what result to expect. I start with the smallest script that demonstrates the point, then write the explanation around it. If the script needs a particular version, compatibility level or permission, say so where the reader will see it.

Edit for correctness and usefulness. Run every code block on a disposable database, check that object names match the prose and remove any screenshot that adds no information. Explain the failure path as well as the successful result. A technical blog post that only works when everything is already configured perfectly is a brochure.

I ask someone unfamiliar with the draft to follow one procedure from start to finish. The questions that person asks reveal missing assumptions. Keep the title specific, the opening concrete and the conclusion tied to the demonstrated result. A useful post earns its length with tested detail, not repeated reassurance.

A good post also has a maintenance path. Record the SQL Server version used for the examples and revisit scripts when features or defaults change. I do not want a reader to treat an old workaround as current guidance because the date was hidden. If a later correction is needed, make it visible and explain the changed assumption. Trust grows when the technical record can be checked and updated.

Related reading on this blog: How to Ask a SQL Server Question That Gets Answered and "Clean Data" Is Not a Requirement: Writing Rules People Can Act On.

A good technical post is not a dump of code, it is a tested answer a reader can understand and reuse.

Published by Pinal Dave on SQLAuthority. More of my work at pinaldave.com.