Parse SQL

Parse SQL into clauses, tokens, and a structured syntax tree.

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ToolSQL Parser
Input
Output
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How it works

SQL tokens become keywords, identifiers, literals, operators, and punctuation; nested statements form an AST with SELECT, FROM, JOIN, WHERE, and related clauses. Parsing exposes structure without executing the query.

  • Dialect selection handles engine-specific grammar.
  • The tree supports formatting and analysis.

Worked example

Parse SELECT Query
Parse a SELECT query into its structural components
Input
											SELECT name, email FROM users WHERE active = true ORDER BY name ASC LIMIT 10
Output
												Type: SELECT
Columns: name, email
Table: users
Where: active = true
Order by: name ASC
Limit: 10

When to use this

Formatters, table-reference analyzers, and security reviews parse SQL.

Edge cases

  • Comments between tokens must not merge keywords.
  • Quoted identifiers can equal reserved words.
  • A common table expression creates a scope before the main SELECT.

References