如何在MySQL存储过程中计算这些日期差和乘法?

时间:2018-11-03 10:10:43

标签: php mysql xampp

我正在尝试在mysql中实现一个返回基于计算的天数的过程。输入购买日期(added_date),然后完成计算。应该相对简单一些,但我似乎无法使其正常工作。我不确定这是否适合“选择语句”,如果这非常简单,这是我第一次在程序中运行,我对此表示歉意。

如果有人可以告诉我该怎么办,将不胜感激。

谢谢!

我有一个名为“ 计算”的表(表3),该表包含字段“ elap_yend”(整数),该字段在调用存储过程之前一直为空。

表1:

cid     parent_cat      category_name            category_life 
22        0             Office Equipment-M'         1080            
23        0             Office Equipment-O'         1800            
24        0             F & F'                      3600            
25        0             Staff assets',              1800            
27        0             Motor vehicle',             2880            
28        0             Air conditioner'            5400            
29        0             Land & Building',           2160            
30        0             Temporary Partition         365         
31        0             Electrical Fittings         3600            
32        0             Generator'                  5400            
33        0             Software'                   1800            
34        0             Computer-N'                 2160            
35        24            chair'                      3600    

Tble 2:

pid    cid    product_name      product_price   added_date  cgst  sgst igst  total      depre 
60      22    RHFL\test\001         20000       2018-11-02  1800  1800  0     23600     o
61      27    RHFL\test\002         13500       2018-11-02  2345  2345  0     15930     12
62      29    RHFL\test\003         65000       2018-11-02  2345  2345  0     76700     12
63      31    RHFL\test\004         10000       2018-11-02  2345  2345  0     1180      12
64      24    RHFL\test\005         10000       2018-11-02  2345  2345  0     11800      1
65      24    RHFL\test\006         13500       2018-11-02  2345  2345  0     15930     12
66      34    RHFL\test\007         13500       2018-11-02  2345  2345  0     15930     12
67      22    RHFL\test\008         65004       2018-11-02  2345  2345  0     76704     12
68      25    RHFL\test\009         10000       0000-00-00  2345  2345  0     11800     12
69      22    RHFL\test\010         65000       0000-00-00  2345  2345  0     76700     10
                                                                                        70

表3:存储过程的输出应反映在下表中:

   end_date   elap_yend rem_days depre_cur cur_wdv depre_next next_wdv acc_depre    
   2018-11-02     0                 0      0         0          0        0

输出计算:

上面是零样本输出。这不是确切的输出,但是每当我调用存储过程时,都应该在计算以下进行这些操作。

   DELIMITER $$

CREATE PROCEDURE calculationTemp(
    in  till_yend date, 
    )
BEGIN
    DECLARE till_yend date;

    SELECT datediff(now(),added_date) INTO till_yend
    FROM products

    IF till_yend > 0 THEN
 SET till_yend = select datediff(now(),added_date) from products;
        ELSEIF till_yend < 0 THEN
        SET till_yend = 0;
    END IF;
 insert into calculationTemp
END$$

计算方式:

过去的年末:         直到每年31 / March / xxxx为止elapsed_yend = add_date(来自产品表(No:2))。

这两个日期之间的天数

remaining_days = category_life-(addd_date(从产品(No:1))到日期的日期差)

category_life(来自类别表(编号:1))例如:移动设备的使用寿命为1080天。

当年折旧: depreciation_cur =(depre / category_life)* elapsed_yend

  • 当年的书面价值:

    current_wdv = depre-depreciation_cur

  • 明年折旧:         depreciation_next =(depre / category_life)* D         D =每年01 / April / xxxx与end_date之间的天差(来自计算表)

  • 下一年的书面价值:

    next_wdv = current_wdv-depreciation_next

  • 累计折旧:

    accumulate_depre =折旧_cur +折旧_pext

1 个答案:

答案 0 :(得分:1)

在此处发布我的答案,以获取有关改善我的商店流程的任何想法。谢谢!!!

 BEGIN
    DECLARE cur_depre,cur_wtvalue,next_depre,next_wtvalue,accum_depre,pro_loss double(20,2);
    DECLARE days,next_diff int;

    CREATE TABLE IF NOT EXISTS calc AS (SELECT p.pid,p_date,days,next_diff,cur_depre,cur_wtvalue,next_depre,next_wtvalue,accum_depre,pro_loss,c.cid,p.added_date,c.category_life,p.depre,p.sale_status,p.sale_date,p.sale_amount from products p,products d,categories c WHERE p.pid=d.pid AND p.cid=c.cid 
     );
     INSERT INTO calc (PID) 
    SELECT PID FROM products WHERE PID NOT IN (SELECT PID FROM calc);
    UPDATE calc set days = datediff(p_date,added_date);
    UPDATE calc set days = 0 WHERE datediff(p_date,added_date) < 0;
    UPDATE calc set next_diff = datediff(sale_date,DATE_ADD(p_date, INTERVAL 1 DAY) );
    UPDATE calc set next_diff = datediff('2019-03-31',added_date) WHERE added_date>p_date;
    UPDATE calc set cur_depre = (depre/category_life)*datediff(p_date,added_date);

    UPDATE calc set cur_depre = 0 where (depre/category_life)*datediff(p_date,added_date)<0;

    UPDATE calc set cur_wtvalue =(depre-(depre/category_life)*datediff(p_date,added_date)); 

    UPDATE calc set cur_wtvalue = 0 WHERE added_date>p_date;

    UPDATE calc set next_depre =( (depre/category_life)*datediff(sale_date,DATE_ADD(p_date, INTERVAL 1 DAY) )) where added_date < p_date;

    UPDATE calc set next_depre =( (depre/category_life) * datediff('2019-03-31',added_date)) WHERE added_Date > p_date;

    UPDATE calc SET next_wtvalue = depre -(depre/category_life)*datediff(p_date,added_date) - (( (depre/category_life)*datediff(sale_date,DATE_ADD(p_date, INTERVAL 1 DAY) )) );
    UPDATE calc SET next_wtvalue = depre - (( (depre/category_life) * datediff('2019-03-31',added_date)))  WHERE added_date>p_date;

    UPDATE calc SET accum_depre = ((depre/category_life)*datediff(p_date,added_date))+( (depre/category_life)*datediff(sale_date,DATE_ADD(p_date, INTERVAL 1 DAY) )) ;
    UPDATE calc SET accum_depre =( (depre/category_life) * datediff('2019-03-31',added_date))  WHERE added_Date > p_date;

    UPDATE calc SET pro_loss = sale_amount-(depre -(depre/category_life)*datediff(p_date,added_date) - (( (depre/category_life)*datediff(sale_date,DATE_ADD(p_date, INTERVAL 1 DAY) )) ) ); 

    UPDATE calc SET pro_loss = 0 WHERE sale_status=0;
    SELECT * from calc;

    END