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We all have one SQL query that is 500 characters long, has no formatting, no indentation, and no comments at all. When you read it, it seems like you're trying to figure out a secret message. With just one click, a SQL formatter turns that mess into code that is easy to read.

Why do you need to format your SQL

It's easier to read and maintain SQL that is well-formatted. If you format your query with line breaks and indentation, it's easy to spot problems. These include missing JOINs, incorrect WHERE conditions, and misspelled column names. Good luck finding anything when everything is on one line.

Before each code review and every time I pull a query from a log file or monitoring tool, I format my SQL. It only takes two seconds, but it makes a big difference between getting the answer right away and having to squint at it for five minutes. What the Formatter Does: Put your messy SQL code into the SQL formatter, and it will make it all look the same. All of the uppercase keywords, like SELECT, FROM, WHERE, JOIN, and ORDER BY, look different.

Right indentation It makes sense to put subqueries and nested conditions in their own lines. Breaks in lines Each clause starts on its own line to make it easy to scan. Columns that are in a line The conditions and column lists fit together perfectly. Consistent spacing No more extra spaces that don't belong or spaces that are missing around operators.

Help with database issues It's not too surprising that SQL isn't a perfect standard. Different databases have different ways of writing things. The formatter can understand MySQL, PostgreSQL, SQL Server, SQLite, and Oracle syntax. Pick your database, and it will handle the syntax correctly.

Choices for Configuration You can change the formatting to match how your team works. The size of the tabs (2 or 4 spaces), the case of the keywords (UPPER, lower, or Title), where to put commas (before or after), and whether to put column lists on separate lines. You should be able to match your team's style guide. How to Use in Real Life This is how I use it in real life.

Our monitoring dashboard gives me a slow query that is a single-line monster. I put it into the formatter, and all of a sudden I can see the hint for the missing index and the three JOINs that aren't needed. I fixed the query, and it worked ten times better. I wouldn't have been able to see the problem if I hadn't formatted it first.

It's also good for taking notes. It's much easier for the next person who needs to understand your queries if you make your SQL look nice in your wiki pages and runbooks. Try it out for free.