如何 select 在 oracle 数据库 table 中 sql 中从月份到月份名称的值

Question

我想要我的数据库 table 日期列到一个月，并且想计算每个月的数据但是，我一次又一次地收到这个错误

SQL> desc fac_cus_chd
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 FDC                                       NOT NULL VARCHAR2(9)
 WHDATE                                    NOT NULL DATE
 SL_NO                                     NOT NULL NUMBER(3)
 ITEMCODE                                  NOT NULL VARCHAR2(11)
 DECCODE                                   NOT NULL VARCHAR2(15)
 GRADE                                     NOT NULL VARCHAR2(1)
 QTY                                       NOT NULL NUMBER(9,2)
 UNIT                                      NOT NULL VARCHAR2(6)
 CARTON                                             VARCHAR2(5)
 UPRICE                                             NUMBER(9,2)
 UPT                                                VARCHAR2(1)
 CARTON_DET                                         VARCHAR2(5)

SQL> select SUM(QTY)
     from fac_cus_chd
     where whdate between to_date(to_char('01-JAN-2019', 'DD-MM-YYYY'), 'Month') AND  to_date(to_char('31-DEC-2019', 'DD-MM-YYYY') ;
  2  /
select to_date(to_char('WHDATE', 'DD-MM-YYYY'), 'Month') from fac_cus_chd
                       *
  ERROR at line 1:
  ORA-01722: invalid number
 SQL>

我希望 o 具有类似

的价值

Month         Qty 
Jan           200000
Feb           33,0000
Mar           34,0000 
APR            32293
May           242434
JUN            24242
JUL             24234
AUG            232423
SEP            242432
OCT            232342
NOV           33423
DEC           3233333

Answer 1

我认为解决方案应该是这样的

with fac_cus_chd as(
select to_date('01-01-2019', 'DD-MM-YYYY') as whdate, 10 as qty from dual union all
select to_date('01-02-2019', 'DD-MM-YYYY') as whdate, 30 as qty from dual union all
select to_date('01-03-2019', 'DD-MM-YYYY') as whdate, 5 as qty from dual union all
select to_date('01-04-2019', 'DD-MM-YYYY') as whdate, 10 as qty from dual union all
select to_date('01-07-2019', 'DD-MM-YYYY') as whdate, 2 as qty from dual union all
select to_date('01-09-2019', 'DD-MM-YYYY') as whdate, 4 as qty from dual union all
select to_date('01-10-2019', 'DD-MM-YYYY') as whdate, 5 as qty from dual union all
select to_date('25-10-2019', 'DD-MM-YYYY') as whdate, 8 as qty from dual union all
select to_date('01-11-2019', 'DD-MM-YYYY') as whdate, 2 as qty from dual union all
select to_date('01-12-2019', 'DD-MM-YYYY') as whdate, 3 as qty from dual union all
select to_date('20-12-2019', 'DD-MM-YYYY') as whdate, 7 as qty from dual
)

    select to_char(trunc(whdate, 'MON'), 'Mon') as month_name
         , sum(qty) as quantity
      from fac_cus_chd
     where trunc(WHDATE, 'MON') between to_date('01-01-2019', 'DD-MM-YYYY')
                                    and to_date('31-12-2019', 'DD-MM-YYYY')
  group by trunc(whdate, 'MON')
  order by trunc(whdate, 'MON')

然后您可以申请订购等

MONTH_NAME  QUANTITY
Jan     10
Feb     30
Mar     5
Apr     10
Jul     2
Sep     4
Oct     13
Nov     2
Dec     10
9 rows

dbfiddle

Answer 2

删除括起 WHDATE 的引号。 TO_DATE() 也不会直接转换列，而是以给定的格式读取数据，就像您 DD-MM-YYYY 下面确保数据被这样读取并转换为 oracle

的默认日期格式

     TO_DATE(WHDATE, 'DD-MM-YYYY')


     TO_CHAR(WHDATE, 'MON')
       //this will give the desired

如何 select 在 oracle 数据库 table 中 sql 中从月份到月份名称的值

how to select value from month to month name in oracle database table in sql

sql

database

oracle

oracle-sqldeveloper

oracle-sql-data-modeler