Question

我必须为以下要求编写存储过程。

所需的输出：税表

CATEGORY_ID TAX_PERCENTAGE  FROM_DATE   CREATE_DATE             TAX_ID  TO_DATE
-------------------------------------------------------------------------------------    
1           10              4/1/2012    12/19/2013 8:54:20 PM   61      31-MAR-13
1           12.5            4/1/2013    12/19/2013 8:54:44 PM   62      31-dec-9998

当插入新的CATEGORY_ID 1表示工作年度为tax_percentage 10（from_date）4/1/2012时，应将默认值放在to_date列中，例如31-dec-9998。当我尝试输入相同的cat_id 1并使用diff值设置为tax_percentage 12.5时，这次from_date 4/1/2013然后to_date值应该是（from_date-1）cat_id 1，tax_percent 10和my to_date值10，cat_id = 1应该使用默认日期31-dec-9998更新。像这样的东西

CREATE OR REPLACE procedure SCOTT.Sp_SaveNewTaxPercentage
(
    iv_category_id number,
    iv_tax_percentage varchar2,
    iv_from_date varchar2,
    iv_to_date varchar2 default '12/31/9998' ,
    iv_created_date date,
    ov_err_code out nocopy varchar2,
    ov_err_msg out nocopy varchar2
)
is
    lv_category_id varchar2(25);
    LV_TO_DATE varchar2(25);
    lv_cat_id varchar2(12);

begin
    ov_err_code:=0;

    for J in ( SELECT CATEGORY_ID,FROM_DATE FROM TAX_P WHERE CATEGORY_ID =IV_CATEGORY_ID)
    loop

        SELECT to_date(iv_from_date,'dd/mm/yyyy') -1  INTO LV_TO_DATE FROM DUAL;
        lv_cat_id := J.CATEGORY_ID;

    end loop;

    update tax_p set TO_DATE=LV_TO_DATE where CATEGORY_ID =lv_cat_id;

    commit;

    IF lv_cat_id IS  NULL THEN 

        LV_TO_DATE := iv_to_Date; 
    END IF;

    insert into tax_p( TAX_ID , CATEGORY_ID  ,TAX_PERCENTAGE, FROM_DATE ,TO_DATE,CREATE_DATE)
    values(tax_seq.nextval,iv_category_id,iv_tax_percentage,iv_from_date,LV_TO_DATE,sysdate);

    select 'Successfully Saved' into ov_err_msg from dual;

    commit;
Exception 
when others then 
    rollback;
    ov_err_code:=1;
    ov_err_msg:='Error while saving'||SQLERRM;
end Sp_SaveNewTaxPercentage;
/

show errors;

Answer 1

我认为您不需要循环记录来更新to_date字段，只需一个UPDATE语句就可以使用。

BEGIN
     UPDATE tax_p
     SET    to_date = to_date(iv_from_date,'dd/mm/yyyy') -1
     WHERE  category_id = iv_category_id;

     INSERT INTO tax_p(tax_id, category_id, tax_percentage, from_date, to_date, create_date)
          VALUES(tax_seq.nextval, iv_category_id, iv_tax_percentage, iv_from_date, iv_to_date, SYSDATE);  

     COMMIT;
EXCEPTION WHEN ...
     ...
END;

plsql insert，更新现有id

1 个答案: