这两个语句差别在哪？
程序代码：create cursor b1 (mc1 c(5),mc c(3))
insert into b1 values ("aab","ab")
insert into b1 values ("abc","abc")
insert into b1 values ("acc","ac")
insert into b1 values ("bc","bc")
insert into b1 values ("A55","A5")SELECT * FROM b1 WHERE ALLTRIM(mc1)<>ALLTRIM(mc)
SELECT * FROM b1 WHERE !ALLTRIM(mc1)==ALLTRIM(mc)
查询结果不同的原因在哪？
谢谢！
