Question

我希望根据表格中输入的数字添加和减去数字。

这是我的代码：

  $uratio =  " 

    UPDATE teams
 LEFT JOIN games g1 ON (teams.ID = g1.op1ID)

SET ratio = ratio 
    + IF(g1.op1gamescore = 1 , g1.op1score, g1.op1score) 
 , ratio = ratio 
     - IF(g1.op1gamescore = 0, g1.op1score, g1.op1score) 

  WHERE g1.ID = '$_POST[id]'    ;   

     ";
      mysql_query($uratio) or die (mysql_error());


     $uratiob =  " 

    UPDATE teams 
    LEFT JOIN games g2 ON (teams.ID = g2.op2ID)
   SET ratio = ratio 
    + IF(g2.op2gamescore = 1, g2.op2score, g2.op2score) 
             , ratio = ratio 
    - IF(g2.op2gamescore = 0, g2.op2score, g2.op2score) 
   WHERE g2.ID = '$_POST[id]'    ;   

    ";
      mysql_query($uratiob) or die (mysql_error());

当op2gamescore = 1时，它将op1设为（负号），而op2设置为（负号）op2是正常但op1不是。

当op1gamescore = 1时，它会做同样的事情。

当op1或op2 = 0时，它会校正数学运算。但不是当它等于1.

它做正确的数学但是op1总是以负号结束，为什么呢？它就像是执行 - 如果不是+ IF ...任何想法？

Answer 1

查询1：

UPDATE 
  teams 
LEFT JOIN 
  games 
ON
  teams.ID = games.op1ID
SET
  ratio = ratio + IF(games.op1gamescore = 1, games.op1score, -1 * games.op1score)

查询2：

UPDATE 
  teams 
LEFT JOIN 
  games 
ON
  teams.ID = games.op2ID
SET
  ratio = ratio + IF(games.op2gamescore = 1, games.op2score, -1 * games.op2score)

更新leftjoin SET +/-问题

1 个答案: