Question

我有这个表模式和数据，我不知道如何更新所有parentid 7,5和1如果在parentid 7下添加新成员示例新添加的是10.然后他所有的父母都进入了树（注意：最多10个父母只开始parentid 7在树上可以更新）7,5和1将被添加到500.

CREATE TABLE `mytree` (
    `pid` INT(11) NOT NULL,
    `memd` INT(11) NOT NULL,
    `position` CHAR(1) NOT NULL,
    `amount` DECIMAL(10,2) NOT NULL
)
COLLATE='latin1_swedish_ci'
ENGINE=MyISAM
;



pid          memd     position      amount

0             1                     1000.00

1             5          L          500.00

1             6          R          0.00

5             7          L          0.00

5             8          R          0.00

7             9          L          0.00

这是我的树。

enter image description here

添加新成员10后

pid          memd     position      amount

0             1                     1500.00

1             5          L          1000.00

1             6          R          0.00

5             7          L          500.00

5             8          R          0.00

7             9          L          0.00

7             10         R          0.00

修改如果父母没有孩子但是又添加了一个孩子，父母不能收到500，或者父母的数量没有更新。

编辑最新问题

问题如果我有一个孩子的系列，然后其中一个孩子配对。，它只会更新他的直接父母的数量，他的父母的上述父母等..，没有更新，我怎么能更新那些他的父母，即使它只有一个孩子，例子9和10也应该收到金额，因为他们是 '11'的父母

   pid          memd     position      amount

    0             1                     1500.00

    1             5          L          1000.00

    1             6          R          0.00

    5             7          L          500.00

    5             8          R          0.00

    7             9          L          0.00

    9             10         L          0.00

    10             11         L          0.00

    11             12         L          0.00

    11             13         R          0.00

我怎样才能做到这一点。

提前谢谢。

Answer 1

我认为这就是你想要的

create procedure sp_update_amt(IN p_mem  INT)
BEGIN
    declare cnt INT;
    declare par_id INT;
    declare cntr INT;
    declare m_mem INT;
    declare s_str VARCHAR(512);
    set cntr=1;
    set par_id = 1;
    set m_mem = p_mem;
    set s_str = '';
proc_label:BEGIN
    WHILE par_id != 0 DO
      SELECT pid INTO par_id FROM mytree WHERE memd=m_mem;
      select count(*) into cnt FROM mytree WHERE pid=par_id;
      set s_str = CONCAT(s_str,cnt,cntr,par_id,m_mem,',');      
      set cntr = cntr+1;
      set m_mem = par_id;
        IF cntr <=10 THEN
          update mytree set amount = amount+500 
          where memd=par_id;
        ELSE
          update mytree set amount = amount+200 
          where memd=par_id;
        END IF;
    END WHILE;
end;
    SELECT s_str;
END;

尝试以上代码认为这将有效并解决您的问题有关详细信息，请查看link

编辑和更新代码

我认为这将解决您的要求。

create procedure sp_update_amt(IN p_mem  INT)
BEGIN
    declare cnt INT;
    declare par_id INT;
    declare cntr INT;
    declare m_mem INT;
    declare s_str VARCHAR(512);
    set cntr=1;
    set par_id = 1;
    set m_mem = p_mem;
    set s_str = '';
proc_label:BEGIN
    WHILE par_id != 0 DO
      SELECT pid INTO par_id FROM mytree WHERE memd=m_mem;
      select count(*) into cnt FROM mytree WHERE pid=par_id;
      set s_str = CONCAT(s_str,cnt,cntr,par_id,m_mem,',');      
      set m_mem = par_id;
      IF cnt = 2 OR cntr > 1 THEN
        IF cntr <= 10 THEN
          update mytree set amount = amount +500 
          where memd=par_id;
        ELSE
          update mytree set amount = amount+200 
          where memd=par_id;
        END IF;
      ELSE
        LEAVE proc_label;
      END IF;
      set cntr = cntr+1;
    END WHILE;
end;
    SELECT s_str;
END;

检查您的数据和代码updated

的链接

Answer 2

这是你的代码

create procedure sp_update_amt(IN p_mem  INT)
BEGIN
    declare cnt INT;
    declare par_id INT;
    declare cntr INT;
    declare m_mem INT;
    set cntr=1;
    set par_id = 1;
    set m_mem = p_mem;
    set s_str = '';
proc_label:BEGIN
    WHILE cntr <= 10 and par_id != 0 DO
      SELECT pid INTO par_id FROM mytree WHERE memd=m_mem;
      select count(*) into cnt FROM mytree WHERE pid=par_id;           
      set cntr = cntr+1;
      set m_mem = par_id;
      IF cnt = 2 THEN
        update mytree set amount = amount+500 
        where memd=par_id;
      ELSE
        LEAVE proc_label;
      END IF;
    END WHILE;
end;

END;

在inserting row之后sp_update_amt拨打call sp_update_amt(inserted_memberid); create procedure sp_update_amt(IN p_mem INT) BEGIN declare cnt INT; declare par_id INT; declare cntr INT; declare m_mem INT; declare s_str VARCHAR(512); set cntr=1; set par_id = 1; set m_mem = p_mem; set s_str = ''; proc_label:BEGIN WHILE par_id != 0 DO SELECT pid INTO par_id FROM mytree WHERE memd=m_mem; select count(*) into cnt FROM mytree WHERE pid=par_id; set s_str = CONCAT(s_str,cnt,cntr,par_id,m_mem,','); set cntr = cntr+1; set m_mem = par_id; IF cnt = 2 THEN IF cntr <=10 THEN update mytree set amount = amount+500 where memd=par_id; ELSE update mytree set amount = amount+200 where memd=par_id; END IF; ELSE LEAVE proc_label; END IF; END WHILE; end; SELECT s_str; END; 那可行。你可以在Link

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Answer 3

您可以使用递归公用表表达式执行此操作，但mysql不支持它们。因此，只需编写一个存储过程即可。

以下是相关问题的链接：https://stackoverflow.com/a/8833676/4350148

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