Question

我有以下的sql脚本。当select查询找不到记录时，insert语句没有插入任何记录。如果select查询找不到任何记录，我想要使用新的序列号和其他具有空值的字段插入记录。我怎么能这样做。

insert into testing.test_ref_details(SEQNUM, TEST_TYPE,TEST_REF_NO)

select '&NEXT_SEQ_NO', '1',max(test_ref_no) as prev_test_ref1 
from    testing.test_runs_status
where   test_type = 1
and run_status = 1
and test_end_dt = (select last_day(add_months(trunc(sysdate),-6))+2 from dual)
group by test_end_dt

Answer 1

insert into testing.test_ref_details(SEQNUM, TEST_TYPE,TEST_REF_NO)
WITH q AS (
select '&NEXT_SEQ_NO' a, '1' b,max(test_ref_no) as prev_test_ref1 
from    testing.test_runs_status
where   test_type = 1
and run_status = 1
and test_end_dt = (select last_day(add_months(trunc(sysdate),-6))+2 from dual)
group by test_end_dt
)
SELECT a, b, prev_test_ref1 FROM q
UNION ALL
SELECT '&NEXT_SEQ_NO', NULL, NULL FROM DUAL
WHERE NOT EXISTS (SELECT NULL FROM q);

Answer 2

PL / SQL解决方案：

begin
  insert into testing.test_ref_details(SEQNUM, TEST_TYPE,TEST_REF_NO)
  select '&NEXT_SEQ_NO', '1',max(test_ref_no) as prev_test_ref1 
  from    testing.test_runs_status
  where   test_type = 1
  and run_status = 1
  and test_end_dt = (select last_day(add_months(trunc(sysdate),-6))+2 from dual)
  group by test_end_dt;

  if sql%rowcount = 0 then
    insert into testing.test_ref_details(SEQNUM)
    values ('&NEXT_SEQ_NO');
  end if;
end;

sql查询 - 插入

2 个答案: