SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Function count (children 1) ExpressionList TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Subquery (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 4) ExpressionList (children 2) Identifier number Function groupArray (alias agg) (children 1) ExpressionList (children 1) Function repeat (children 1) ExpressionList (children 2) Function toString (children 1) ExpressionList (children 1) Identifier number Literal UInt64_1000000 TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function numbers (children 1) ExpressionList (children 1) Literal UInt64_1000000 ExpressionList (children 1) Identifier number Function notEmpty (children 1) ExpressionList (children 1) Identifier agg