标签：san rac acl lin name string bar toolbar sel
用法如下：
select
case
when
exists(
1
from
t_test c
where
c.
name
=
‘zhangsan‘
and
c.age = 23 )
then
else
0
end
dual;
oracle case when exists()
原文地址：http://www.cnblogs.com/soundcode/p/6801017.html
