I want a Report based of this 2 tables

Question

   create table label_table(
   label_id number not null,
   label_name varchar2(50),
   no_months number not null,
   no_of_mobile_sims number not null,
   no_of_services number not null,
   delayed number not null,
   value_of_client number(6,2),
   constraint pk PRIMARY KEY(label_id)
   );

   create table client(
   customer_id number not null,
   customer_name varchar2(50) not null,
   no_months number not null,
   no_of_mobile_sims number not null,
   no_of_services number not null,
   delayed number not null,
  value_of_client number(6,2),
  constraint pk_key PRIMARY KEY(customer_id)
  ) ;


  SELECT
   l.label_id,
   l.label_name,
   k.customer_id,
   k.customer_name
   FROM
   label_table   l
   inner JOIN client k ON k.value_of_client>l.value_of_client                                        
   ORDER BY 1;

If we do a select * from client we have this output:

13 x_name        3                 4              2           0           74.38

And if we do a select * from label_table we this output:

1 Diamond                  2                 2              2          0              70
2 Gold                     2                 1              2          2              50

We have our client x_name who join our phone company let s say and i want to have a report where it will say that x_name is a diamond client based on a comparison between the common columns of these 2 tables and i want an output like this:

13 x_name Diamond

And i want to this with a join but the problem is every time i try my client will be identified with both labels because he respect the conditions(>,<,!=,=) of both labels. The idea is i have 16 clients that have different values and i want to put every one of them in a unique label not in more based on this 2 tables. For example client.no_of_months>label.table.no_of_months,client.value_of_client>label.client.value_of_client then a label but how i said upper i need every client to be in his first choice label if a client is a diamond the output will be diamond not diamond,gold,silver,bronze even if he can be in that labels too.

Answer 1

I guess you may try below query -

SELECT customer_id, customer_name, label_name
FROM (SELECT k.customer_id,
             k.customer_name,
             l.label_name,
             ROW_NUMBER() OVER(PARTITION BY k.customer_id ORDER BY l.value_of_client DESC) RN
      FROM label_table   l
      inner JOIN client k ON k.value_of_client>l.value_of_client)
WHERE RN = 1
ORDER BY 1;

Answer 2

  SELECT
  k.customer_id,
  k.customer_name,
  l.label_name
  FROM
  label_table   l
  right JOIN client k ON k.value_of_client != l.value_of_client
where l.label_id=(case when k.value_of_client>(select value_of_client from label_table where label_id=1)
                   and  k.delayed=(select delayed from label_table where label_id=1)
                   and k.no_months >(select no_months from label_table where label_id=1)
                   and k.no_of_services>=(select no_of_services from label_table where label_id=1)
                   and k.no_of_mobile_sims>=(select no_of_mobile_sims from label_table where label_id=1)
                   then 1

                   when k.value_of_client > (select value_of_client from label_table where label_id=2) 
                   and  k.delayed<(select delayed from label_table where label_id=2)
                   and k.no_months >=(select no_months from label_table where label_id=2)
                   and k.no_of_services>=(select no_of_services from label_table where label_id=2)
                   and k.no_of_mobile_sims>(select no_of_mobile_sims from label_table where label_id=2)
                   then 2

                   when k.value_of_client>(select value_of_client from label_table where label_id=3)
                   and  k.delayed<(select delayed from label_table where label_id=3)
                   and  k.no_months >(select no_months from label_table where label_id=3)
                   and  k.no_of_services>(select no_of_services from label_table where label_id=3)
                   and  k.no_of_mobile_sims>(select no_of_mobile_sims from label_table where label_id=3)
                   then 3
                   else 4
                   end)
ORDER BY 1;