Regex Tester & Validator

This regex extracts column aliases and identifiers from SQL queries in two ways: it matches tokens following an 'as' or 'AS' keyword (capturing the alias name), and it matches identifiers appearing immediately before an equals sign (variables in comparisons or assignments). It treats whitespace, periods, commas, parentheses, hyphens, and equals signs as token delimiters. Useful for SQL parsing, query analysis, and extracting column names from SELECT statements or WHERE clauses.