SQL Query Analyzer
Format SQL and flag dangerous mutations, missing WHERE clauses, SELECT *, and JOIN complexity hints.
What is SQL Query Analyzer?
Format a query and flag a few visible text patterns such as SELECT *, destructive statements or a write without a visible WHERE. The tool has no database connection or execution plan.
How to use SQL Query Analyzer?
Step 1
Paste a SQL query or migration snippet.
Step 2
Review the formatted output and warnings for risky patterns.
Step 3
Copy the formatted query after confirming it targets the expected rows.
Example input / output
DELETE FROM orders triggers a review warning. A WHERE inside a comment or another statement does not make every write safe, so inspect each statement and its transaction context manually.
Example input
SELECT * FROM orders WHERE status = 'pending';Check the result
- A static analyzer cannot know your indexes, row counts, locks, or execution plan.
- Always run destructive queries in a transaction or staging environment when possible.
Practical developer examples
Review the affected rows
Use the database's own preview, transaction policy and permissions before changing production data. Text heuristics cannot establish the true write scope.
Measure performance in the database
Compare an execution plan, row estimates, actual timings and indexes on representative data. Indentation and a lack of warnings do not prove optimization.
Common developer use cases
Comments, string literals and dialect syntax can cause false positives or negatives. This is a text review aid, not a SQL security scanner or optimizer.
Common issues
FAQ
Does this run EXPLAIN?
No. It never contacts a database.
Is a query safe if there are no warnings?
No. Only a few textual patterns are checked; review the actual query and execution context.