Namespace Alchemy\core\query
| ColumnRef | Represents a reference to a column in SQL query | 
| DDLQuery | Represents a DDL transformation query | 
| Expression | Class for composing expressions | 
| Insert | Represent an INSERT statement | 
| Join | Represent a JOIN clause | 
| Predicate | Represents a true/false logical predicate | 
| Query | Represents a generalized SQL query | 
| Scalar | Represent a Scalar value in SQL | 
| TableRef | Represents a reference to a table in a SQL query | 
| IQuery | Interface for all executable query like objects | 
| IQueryFragment | Interface for query fragments | 
| IQueryValue | Interface for query fragments |