Question

我做错了什么？

SQL> select ename, job, oder by (ascending order)hiredate  from emp where hiredate between '20-FEB-81' AND '01-MAY-81';
select ename, job, oder by (ascending order)hiredate  from emp where hiredate between '20-FEB-81' AND '01-MAY-81'
                    *
ERROR at line 1:
ORA-00923: FROM keyword not found where expected


SQL>

表

SQL> select ename, job, hiredate  from emp where hiredate between '20-FEB-81' AND '01 MAY-81';

ENAME      JOB       HIREDATE
---------- --------- ---------
BLAKE      MANAGER   01-MAY-81
JONES      MANAGER   02-APR-81
ALLEN      SALESMAN  20-FEB-81
WARD       SALESMAN  22-FEB-81

SQL>

Answer 1

ORDER BY子句位于WHERE子句
ORDER BY子句是一个单独的子句 - 您不会将其应用于SELECT列表中的列。
语法为ORDER BY column_name [ASC|DESC]

所以你想要像

SQL> select ename, job, hiredate
  2    from emp
  3   where hiredate between to_date( '20-FEB-81', 'DD-MON-RR' ) and
  4                          to_date( '01-MAY-81', 'DD-MON-RR' )
  5   order by hiredate asc;

ENAME      JOB       HIREDATE
---------- --------- ----------
ALLEN      SALESMAN  1981-02-20
WARD       SALESMAN  1981-02-22
JONES      MANAGER   1981-04-02
BLAKE      MANAGER   1981-05-01

Answer 2

订单来到最后（你也有“oder”而非“订单”）

select ename, job, hiredate  
from emp where hiredate between '20-FEB-81' AND '01-MAY-81'
order by hiredate  asc

升序是默认值，因此除非您想要降序，否则不需要它，但它有利于可读性

Answer 3

select ename, job, hiredate  from emp where hiredate between '20-FEB-81' AND '01 MAY-81' order by hiredate acs

租赁日期的升序

3 个答案: