SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function divide (alias z_r) (children 1)
     ExpressionList (children 2)
      Function sum (children 1)
       ExpressionList (children 1)
        Identifier mul
      Function sqrt (children 1)
       ExpressionList (children 1)
        Function multiply (children 1)
         ExpressionList (children 2)
          Function sum (children 1)
           ExpressionList (children 1)
            Identifier sqr_dif_1
          Function sum (children 1)
           ExpressionList (children 1)
            Identifier sqr_dif_2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 6)
           Subquery (alias avg_values) (children 1)
            SelectWithUnionQuery (children 1)
             ExpressionList (children 1)
              SelectQuery (children 2)
               ExpressionList (children 2)
                Function avg (alias z_1_avg) (children 1)
                 ExpressionList (children 1)
                  Identifier z_1
                Function avg (alias z_2_avg) (children 1)
                 ExpressionList (children 1)
                  Identifier z_2
               TablesInSelectQuery (children 2)
                TablesInSelectQueryElement (children 1)
                 TableExpression (children 1)
                  Subquery (alias jss1) (children 1)
                   SelectWithUnionQuery (children 1)
                    ExpressionList (children 1)
                     SelectQuery (children 3)
                      ExpressionList (children 2)
                       Identifier perf_1.site
                       Identifier perf_1.z (alias z_1)
                      TablesInSelectQuery (children 1)
                       TablesInSelectQueryElement (children 1)
                        TableExpression (children 1)
                         TableIdentifier perf (alias perf_1)
                      Function equals (children 1)
                       ExpressionList (children 2)
                        Identifier user_id
                        Literal UInt64_0
                TablesInSelectQueryElement (children 2)
                 TableExpression (children 1)
                  Subquery (alias jss2) (children 1)
                   SelectWithUnionQuery (children 1)
                    ExpressionList (children 1)
                     SelectQuery (children 3)
                      ExpressionList (children 2)
                       Identifier perf_2.site
                       Identifier perf_2.z (alias z_2)
                      TablesInSelectQuery (children 1)
                       TablesInSelectQueryElement (children 1)
                        TableExpression (children 1)
                         TableIdentifier perf (alias perf_2)
                      Function equals (children 1)
                       ExpressionList (children 2)
                        Identifier user_id
                        Literal UInt64_999
                 TableJoin (children 1)
                  ExpressionList (children 1)
                   Identifier site
           Function minus (alias dif_1) (children 1)
            ExpressionList (children 2)
             Identifier z_1
             Function tupleElement (children 1)
              ExpressionList (children 2)
               Identifier avg_values
               Literal UInt64_1
           Function minus (alias dif_2) (children 1)
            ExpressionList (children 2)
             Identifier z_2
             Function tupleElement (children 1)
              ExpressionList (children 2)
               Identifier avg_values
               Literal UInt64_2
           Function multiply (alias mul) (children 1)
            ExpressionList (children 2)
             Identifier dif_1
             Identifier dif_2
           Function multiply (alias sqr_dif_1) (children 1)
            ExpressionList (children 2)
             Identifier dif_1
             Identifier dif_1
           Function multiply (alias sqr_dif_2) (children 1)
            ExpressionList (children 2)
             Identifier dif_2
             Identifier dif_2
          TablesInSelectQuery (children 2)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Subquery (alias js1) (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 3)
                 ExpressionList (children 2)
                  Identifier perf_1.site
                  Identifier perf_1.z (alias z_1)
                 TablesInSelectQuery (children 1)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 1)
                    TableIdentifier perf (alias perf_1)
                 Function equals (children 1)
                  ExpressionList (children 2)
                   Identifier user_id
                   Literal UInt64_0
           TablesInSelectQueryElement (children 2)
            TableExpression (children 1)
             Subquery (alias js2) (children 1)
              SelectWithUnionQuery (children 1)
               ExpressionList (children 1)
                SelectQuery (children 3)
                 ExpressionList (children 2)
                  Identifier perf_2.site
                  Identifier perf_2.z (alias z_2)
                 TablesInSelectQuery (children 1)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 1)
                    TableIdentifier perf (alias perf_2)
                 Function equals (children 1)
                  ExpressionList (children 2)
                   Identifier user_id
                   Literal UInt64_999
            TableJoin (children 1)
             ExpressionList (children 1)
              Identifier site