Free SQL Query Visualizer

Paste a SELECT query below to see its table JOINs diagrammed and its clauses broken down in the order your database actually evaluates them — not the order you type them in.

About the SQL Query Visualizer

Reading someone else's SQL query — especially one with two or three JOINs — often means mentally tracing which table connects to which and how, before you can even start reasoning about the WHERE clause. This tool does that tracing for you: paste a query and it diagrams the join graph and lays out every clause in the order the database actually evaluates it, not the order you typed it in.

It parses your SQL with a real SQL parser rather than pattern-matching keywords, so it correctly handles table aliases, mixed JOIN types in the same query, and multi-condition ON clauses. Need to build a query from scratch instead of visualizing an existing one? Try the AI SQL Generator, or get a plain-English explanation of a query with the SQL Query Explainer.

Common Mistakes This Diagram Helps Catch

• An accidental cross join. If a JOIN is missing its ON condition, the diagram will show a join with no condition label — a strong sign the query will return a much larger result set than intended.
• The wrong join type for the intent. Seeing "INNER JOIN" highlighted in the diagram when you actually wanted every row from the left table (which needs LEFT JOIN) is easier to catch visually than by reading the raw SQL text.
• Filtering in the wrong clause. The execution-order panel makes it visible when a condition that should be in WHERE (filtering rows before grouping) was accidentally written as HAVING (which filters groups after aggregation), or the reverse.

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