下面的语句有什么错误，怎么修改
pb连的oracle库
to_char(b.cshsj, 'yyyy.mm.dd') <= c_endsj and to_char(b.cshsj, 'yyyy.mm.dd') >= c_startsj


[解决办法]
to_char(b.cshsj, 'yyyy.mm.dd') <= :c_endsj and to_char(b.cshsj, 'yyyy.mm.dd') >= :c_startsj
[解决办法]