关于sql查询

时间:2010-07-02 01:01:54

标签: sql oracle plsql

我有以下sql查询来插入表中的记录。问题是当没有select查询的记录时,我仍然想要一个带有序列号的记录,null,'3'值被插入。如果没有找到select查询的记录,则不会插入任何内容。我怎么能这样做?

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

2 个答案:

答案 0 :(得分:4)

一种方法是

insert into test_details(seqnbr,trpid,type)
select '&seqid',rep_id,'3' from ref_details where rep_id>13
union all select '&seqid',null,'3'
from dual where not exists(
select 1 from ref_details where rep_id>13)

答案 1 :(得分:3)

Oracle 9i +:

要填补空白,您需要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

...然后LEFT JOIN到可能有间隙的表格。