SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 4) ExpressionList (children 1) Asterisk TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 2) TableIdentifier view SampleRatio 1 / 10 ExpressionList (children 1) OrderByElement (children 1) Identifier c Literal UInt64_10