| column_references | Return the column references in a parsed SQL query | 
| extract_alias | Extract the column alias from a SQL expression | 
| parse_expression | Parse a SQL expression | 
| parse_query | Parse a SQL query | 
| split_query | Split a SQL query | 
| squish_sql | Squish a SQL query or SQL expression | 
| unqualify_query | Remove prefixes from column references in a parsed SQL query |