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snail5007
[专家分：0] 发布于 2010-06-10 18:09:00
1、sele a.* from dba01-100531 a,x6-yjjh b where a.jh=b.jh
2、sele * from dba01-100531 where dba01-100531.jh=x6-yjjh.jh
3、sele * from dba01-100531,x6-yjjh where dba01-100531.jh=x6-yjjh.jh
4、sele dba01-100531.* from dba01-100531 where dba01-100531.jh=x6-yjjh.jh
5、sele dba01-100531.* from dba01-100531,x6-yjjh where dba01-100531.jh=x6-yjjh.jh[/size][/size][/size][/size][/size][/size]
结果是1正确，其余都错误
这几行语句到底有什么区别
2、sele * from dba01-100531 where dba01-100531.jh=x6-yjjh.jh
3、sele * from dba01-100531,x6-yjjh where dba01-100531.jh=x6-yjjh.jh
4、sele dba01-100531.* from dba01-100531 where dba01-100531.jh=x6-yjjh.jh
5、sele dba01-100531.* from dba01-100531,x6-yjjh where dba01-100531.jh=x6-yjjh.jh[/size][/size][/size][/size][/size][/size]
结果是1正确，其余都错误
这几行语句到底有什么区别
