Question

I have the below sql query to insert the records from a table. The problem is when there is no records for select query i still want an record with the sequence number,null,’3′ value inserted. Nothing get’s inserted when there is no record found for select query. how can i do it?

insert into test_details(seqnbr,trepid,type)
select '&seqid'
      ,REP_ID
      ,'3'
  FROM ref_details
 WHERE REP_ID >13;

Answer 1

Oracle 9i+:

To fill in gaps, you need to create a list of sequencial values:

INSERT INTO TEST_DETAILS
  (seqnbr, trpid, type)
 SELECT '&seqid', rd.rep_id, '3'
     FROM (SELECT LEVEL + 13
             FROM DUAL
       CONNECT BY LEVEL <= 13) x
LEFT JOIN REF_DETAILS rd ON rd.rep_id = x.level
                        AND rd.rep_id > 13

…then LEFT JOIN to the table that can have gaps.