sqlplus
SQL> set numw 30
select FORCE_MATCHING_SIGNATURE, count(1)
from v$sql
where FORCE_MATCHING_SIGNATURE > 0
and FORCE_MATCHING_SIGNATURE != EXACT_MATCHING_SIGNATURE
group by FORCE_MATCHING_SIGNATURE
having count(1) > &a
order by 2;
根据 FORCE_MATCHING_SIGNATURE 找出相应的SQL进行分析
PLSQ 在tools—preferences—window type—SQL windows—number_fields to_char勾上（避免显示科学计数）
