SQL Developer - 在我的查询的where子句中使用开始和结束日期变量

时间:2010-11-03 01:38:47

标签: oracle variables oracle-sqldeveloper

我有一个每天运行的查询,需要StartDateEndDate值。 StartDateEndDate曾经是手动输入,但我试图摆脱这种情况并计算要在查询中使用的StartDateEndDate。我已经开发了代码来捕获变量中的StartDateEndDate

DECLARE

    c_DateMask VARCHAR2(20) := 'DD-Mon-YYYY';
    c_TimeMask VARCHAR2(20) := 'HH24:MI';

    v_Month char(4) := 'Prev'; 
    v_StartDate date; 
    v_EndDate date; 
    v_Environment char(7) := 'Prod';  

BEGIN

    if v_MONTH = 'Prev'
        THEN 
            select TO_DATE ('01-' || TO_CHAR (ADD_MONTHS (SYSDATE, -1),'mon-yyyy')) into v_StartDate from dual; 
            select Last_day(TO_DATE('01-' || TO_CHAR (ADD_MONTHS (SYSDATE, -1),'mon-yyyy'))) into v_EndDate from dual;
        ELSE
            select TO_DATE ('01-' || TO_CHAR (ADD_MONTHS (SYSDATE, 0),'mon-yyyy')) into v_StartDate from dual;
            CASE
                WHEN v_Environment = 'Prod'
                    THEN
                        -- Production Environment --
                          select 
                              to_char(sysdate, 'dd-Mon-yyyy ') ||
                              case 
                                  when to_char(sysdate, 'mi') between 00 and 20
                                    then to_char(sysdate, 'hh24')-1||':58'||':00' 
                                  when to_char(sysdate, 'mi') between 21 and 40
                                    then to_char(sysdate, ' hh24')||':18'||':00' 
                                  when to_char(sysdate, 'mi') between 41 and 60
                                    then to_char(sysdate, ' hh24')||':38'||':00'
                              END 
                          into v_EndDate from dual;
                WHEN v_Environment = 'OldTest'
                    THEN
                       -- Test Environment --
                            select 
                                to_char(sysdate, 'dd-Mon-yyyy ') ||
                                case 
                                when to_char(sysdate, 'mi') between 10 and 30
                                    then to_char(sysdate, 'hh24')||':08'||':00'
                                when to_char(sysdate, 'mi') between 31 and 50
                                    then to_char(sysdate, ' hh24')||':28'||':00' 
                                when to_char(sysdate, 'mi') between 51 and 60
                                    then to_char(sysdate, ' hh24')||':48'||':00'
                                END 
                            into v_EndDate from dual;
            end case;    
    end if;

然后我想在下面的select语句中使用变量:

    -----------------
    /* KPI Figures */
    -----------------

    SELECT 
        SysDate as RunTime
        , v_StartDate
        , v_EndDate
        , TTM_OFF_CONTRIBUTOR
        , SUM(NVL(TTM_PER_OFF_FEE,0)) Fees
    FROM  [Table]
    Where 
        TTM_PROCESSED_DATE    >= v_StartDate
        AND TTM_PROCESSED_DATE    <= v_EndDate
    group by SysDate, v_StartDate, v_EndDate, TTM_OFF_CONTRIBUTOR

END;

直到我尝试在KPI数据查询中使用变量值时,一切正常。我错过了什么?

更新

关于Phil's answer:我试过但它没有用,我收到以下错误:

  

PLS-00428: an INTO clause is expected in this SELECT statement.

我确信我昨天看到了另一个回复,现在已经消失了,可以为变量或其他东西分配多个值。

这就是我需要的,我该怎么做?

3 个答案:

答案 0 :(得分:1)

变量v_StartDate和v_EndDate仅在声明它们的PL / SQL块中的范围内。看起来您正在尝试在单独的查询中使用它们。为此,您需要在PL / SQL块之外创建SQL Developer绑定变量,如下所示:

var v_start_date varchar2(11)
var v_end_date varchar2(11)

然后在PL / SQL块和SQL查询中将它们作为绑定变量引用:

declare
  ...
begin
  ....
  :v_start_date := '01-' || TO_CHAR (ADD_MONTHS (SYSDATE, -1), 'mon-yyyy');
  :v_end_date := TO_CHAR(Last_day(TO_DATE('01-' 
                 || TO_CHAR (ADD_MONTHS (SYSDATE, -1),'mon-yyyy'))));
  -- (NB No need to select from dual)
  ...
end;

SQL:

...
Where 
TTM_PROCESSED_DATE    >= TO_DATE(:v_StartDate)
AND TTM_PROCESSED_DATE    <= TO_DATE(:v_EndDate)

请注意,这些变量不能使用DATE类型声明,因此需要将它们转换回查询中的日期(使用正确的格式掩码)。

答案 1 :(得分:1)

我建议你将startdate / enddate包装在两个函数(存储过程)中

create or replace function get_startdate(p_month in varchar2, p_env in varchar2)
return date
is
  l_return date;
begin
   ... logic goes here ...
   return l_return;
end;

类似于enddate。

然后在查询中使用这些函数:

SELECT 
    SysDate as RunTime
    , get_startdate('Prev', 'Prod')
    , get_enddate('Prev', 'Prod')
    , TTM_OFF_CONTRIBUTOR
    , SUM(NVL(TTM_PER_OFF_FEE,0)) Fees
FROM  [Table]
Where 
    TTM_PROCESSED_DATE    >= get_startdate('Prev', 'Prod')
    AND TTM_PROCESSED_DATE    <= get_enddate('Prev', 'Prod')
group by SysDate, get_startdate('Prev', 'Prod'), get_enddate('Prev', 'Prod'), TTM_OFF_CONTRIBUTOR

旁注:请考虑更简洁的版本来确定一个月的第一天和最后一天。您也可以在不使用SELECT INTO的情况下为变量赋值,例如

startdate := trunc(sysdate, 'MM'); -- first day of current month
enddate := last_day(trunc(sysdate, 'MM')); -- last day of current month

要计算小时数,您可以添加/减去几分钟,这比您执行的所有to_date / to_char转换更具可读性,例如

enddate := trunc(sysdate, 'HH24');
case 
  when to_char(sysdate, 'mi') between 00 and 20 then enddate := enddate - 2/(24*60);
  when to_char(sysdate, 'mi') between 21 and 40 then enddate := enddate + 18/(24*60);
  when to_char(sysdate, 'mi') between 41 and 60 then enddate := enddate + 38/(24*60);
end; 
祝你好运,马丁

答案 2 :(得分:0)

我认为问题出在您的查询和别名上。尝试

SELECT 
    SysDate as RunTime
    , v_StartDate AS StartDate
    , v_EndDate AS EndDate
    , TTM_OFF_CONTRIBUTOR
    , SUM(NVL(TTM_PER_OFF_FEE,0)) Fees
FROM  [Table]
Where 
    TTM_PROCESSED_DATE    >= v_StartDate
    AND TTM_PROCESSED_DATE    <= v_EndDate
group by RunTime, StartDate, EndDate, TTM_OFF_CONTRIBUTOR