| Alias | 
 Simple encapsulation of the alias name of an object in a SQL statement. 
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| FromAdapter | 
 Adapter for building the FROM clause of a SELECT statement 
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| FromItem | 
 An entry in the FROM clause 
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| FromSubQueryAdapter | 
 The FromClause adapter 
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| GroupByAdapter | 
 The GROUP BY part of a SELECT statement 
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| HavingAdapter | 
 Represents the "HAVING" part of a SELECT statement. 
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| OrderByAdapter | 
 The ORDER BY part of a SELECT statement 
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| Select | 
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| SelectAdapter | 
 An abstract representation of a select statement which can be translated
 into an executable select statement. 
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| SelectItem | 
 A column reference, expression or sub-query item used in the selection list 
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| SelectItemColumn | 
 An item of the SELECT list which is a simple column reference 
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| SelectItemSubQuery | 
 Item in a SELECT clause which is itself a sub-query 
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| WhereAdapter | 
 Adapter to help build the WHERE clause expression. 
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