SELECT
OrderSN
INTO
OrderSN
FROM(
SELECT
OrderSN,
ROWNUM
FROM
goOutOrder
where
OrderNO
=
OrderNO
and
Clno
=
Clno)
WHERE
ROWNUM
<=1;
这句话需要有数据才行
你可以加个判断
select
count(1)
into
num
from
goOutOrder;
if
num>=1
then
SELECT
OrderSN
INTO
OrderSN
FROM(
SELECT
OrderSN,
ROWNUM
FROM
goOutOrder
where
OrderNO
=
OrderNO
and
Clno
=
Clno)
WHERE
ROWNUM
<=1;
else
OrderSN='';
end
if;