1  (1)  SELECT SelectClause FromClause
2? WhereClause

WHERE

1 SelectClause =  
2+ <<---- ,------ <<
2 Expression
2.1? 
2.1 AS Path
2.1 INSERT
2 ITEM Expression
2.0 COUNT (2) 
2.0 MAX
2.0 MIN
2.0 SUM
2.1 ( Expression )

1 FromClause =   FROM
2+ <<---- ,------ <<
2 FieldReference
2.1? AS CorrelationName

1 WhereClause =   WHERE Expression