查询包含有%的结果

SQL> select * from tt2;

A                 B
-------- ----------
aaa2%           111
bbb3%           222
ccc0%           333
cccab           556
dd3f           8898
aaks           8899

6 rows selected.

SQL> select * from tt2
  2  where a like '%3\%%' escape '\';

A                 B
-------- ----------
bbb3%           222