与不同表结构相关的sql查询

Question

I have 3 tables,

• table A with column fields id , code_id , claim_id ,
• table B with column fields id , claim_id , mem_id and p_id ,
• table C with id , code_id , end_dt , order_id , strt_date .

Now i have to select those claim_d from table A which are not in table b and insert those additional claim_id in table C . id is the primary key.structure for all table is different, can anyone let me know how to do this??

i got the additional rows from table A by following query:

select distinct ad.claim_id 
 FROM tableA a
 left join tableC c 
 on LEFT(c.CLAIM_ID,12) = a.Claim_id 
 where id is not null

then I am not sure how to add those columns in tableB ??

Answer 1

Based on the user input, following is the proposed query:

   declare @outputTable table (id int, claimid varchar(50) not null)

   -- identify values from table A that are not in table B
   ;with cteClaimIdsInAButNotInB
   as
   (
     select
       a.claim_id, a.code_id
     from
       tableA a
       left outer join tableB b on 
           a.claim_id = b.claim_id
     where
       b.claim_id is null
   )

   -- Add these newly found values to tableB and get the id from it
   merge into tableB as b
   using cteClaimIdsInAButNotInB as cte
   on (b.claimid = cte.claimid)
   when not matched then
          insert(claimid) values(cte.claimid)
          output inserted.id, cte.claimid into @outputTable(id, claimid)

   -- Add these newly added values from tableB to tableC as well
   insert into tableC(id, claimid)
   select id, claimid from @outputTable

Answer 2

Just modify the code to use the correct fields ...

 ;
    with cteClaimIdsInAButNotInB
       as
       (
           select
               a.claim_id, a.code_id, a.id
           from
               tableA a
               left outer join tableB b on 
                   a.claim_id = b.claim_id
           where
               b.claim_id is null
       )

       insert into tableC (claim_id, code_id)
       select claim_id, code_id from cteClaimIdsInAButNotInB;