Validate SQL

Check SQL for balanced syntax, statement structure, and common dialect mistakes.

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ToolSQL Validator
Input
Output
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Preview

How it works

SQL text is tokenized and checked for delimiters, identifiers, literals, statement structure, and common dialect errors. Findings are reported without connecting to a database or executing the statement.

  • Dialect selection matters for quoting and pagination syntax.
  • Lint warnings remain separate from parse errors.

Worked example

Validate Query
Check a SQL query for syntax errors and common issues
Input
											SELECT name FROM users WHERE active = true; DELETE FROM orders;
Output
												Message: DELETE without WHERE clause will remove all rows
Position: 43

When to use this

Migration CI, editor query checks, and code reviews validate SQL.

Edge cases

  • A semicolon inside a string is not another statement.
  • PostgreSQL double quotes name identifiers while single quotes delimit strings.
  • Valid SQL can still update every row or scan a whole table.

References