SQL语法还是数据库压缩？

我有两个表，每个表都有一列

MNR

。我想和他们一起写这个专栏

以下两条SQL语句失败。最后一个显示我的日期格式正在工作（更改了会话格式）。DB是Oracle

有人能告诉我我做错了什么吗？我怎么称呼这次加入

// fails
select a.CREATEDATE, a.BELEGNRRECH, a.MNR, a.UTNR, a.KTXT, b.ANR
from INFOR.RELFBR as a, INFOR.RELXDB as b
where (a.SAINT = '90') and (a.MNR = b.MNR) and (b.SAINT = '10')
     and (a.CREATEDATE >= '01.01.2014 00:00:00')
order by a.CREATEDATE

// fails as well
select a.CREATEDATE, a.BELEGNRRECH, a.MNR, a.UTNR, a.KTXT, b.ANR
from INFOR.RELFBR as a, INFOR.RELXDB as b
where (a.SAINT = '90') and (a.MNR = b.MNR) and (b.SAINT = '10')
order by a.CREATEDATE

// all fine
select CREATEDATE, MNR
from INFOR.RELFBR
where (CREATEDATE >= '01.01.2014 00:00:00')
order by CREATEDATE

失败的错误是

ORA-00933:SQL命令未正确结束

---

删除“order by…”后会出现相同的错误。

从表别名中排除AS-AS可用于选择列表，但不能用于from子句中

select a.CREATEDATE, a.BELEGNRRECH, a.MNR, a.UTNR, a.KTXT, b.ANR
from INFOR.RELFBR a, INFOR.RELXDB b
where (a.SAINT = '90') and (a.MNR = b.MNR) and (b.SAINT = '10')
     and (a.CREATEDATE >= '01.01.2014 00:00:00')
order by a.CREATEDATE

例如：

SQL> select * from t_dummy t;

                      X                                                         
-----------------------                                                         
                 9.0000                                                         

SQL> select * from t_dummy as t;
select * from t_dummy as t
                      *
error in line 1:
ORA-00933: SQL command not properly ended

文件：

---

错误消息是什么？失败。。。。哪个错误？@BobJarvis我用C#获取数据。将引发一个异常，显示此错误消息。不，我没有任何行。哇，我肯定我在某个地方用了

中的
作为
。但我错了。我什么也找不到。спасибо!现在我明白我为什么会犯这个错误了：