mysql更新倍數為什么不起作用？ 哦，還php

Question

我不明白為什么這行不通，每一行都一個接一個地起作用，但是當我將它們連接在一起時卻不起作用...

mysql_query("
 UPDATE imageProperties
  SET value='98' WHERE element='img1' AND property='left';
  SET value='67' WHERE element='img1' AND property='top';
  SET value='15' WHERE element='img1' AND property='width';
  SET value='15' WHERE element='img1' AND property='height';
  SET value='22' WHERE element='img2' AND property='left';
  SET value='49' WHERE element='img2' AND property='top';
  SET value='62' WHERE element='img2' AND property='width';
  SET value='75' WHERE element='img2' AND property='height';
");

我從答案的想法，這個問題在這里

Answer 1

語法錯誤。每個集合都應具有UPDATE imageProperties：

UPDATE imageProperties
  SET value='98' WHERE element='img1' AND property='left';
UPDATE imageProperties
  SET value='67' WHERE element='img1' AND property='top';
UPDATE imageProperties
  SET value='15' WHERE element='img1' AND property='width';

Answer 2

在一則陳述中使用CASE陳述來嘗試一下。

   UPDATE imageProperties
   SET value= CASE when element='img1' AND property='left'   then '98' 
                   when element='img1' AND property='top'    then '67'
                   when element='img1' AND property='width'  then '15'
                   when element='img1' AND property='height' then '15'
                   when element='img2' AND property='left'   then '22'
                   when element='img2' AND property='top'    then '49'
                   when element='img2' AND property='width'  then '62'
                   when element='img2' AND property='height' then '75'
               ELSE `value`
               END

Answer 3

您將用每個分號終止該語句。

這應該工作：

mysql_query("
 UPDATE imageProperties
  SET value='98' WHERE element='img1' AND property='left';
 UPDATE imageProperties
  SET value='67' WHERE element='img1' AND property='top';
 UPDATE imageProperties
  SET value='15' WHERE element='img1' AND property='width';
 UPDATE imageProperties
  SET value='15' WHERE element='img1' AND property='height';
 UPDATE imageProperties
  SET value='22' WHERE element='img2' AND property='left';
 UPDATE imageProperties
  SET value='49' WHERE element='img2' AND property='top';
 UPDATE imageProperties
  SET value='62' WHERE element='img2' AND property='width';
 UPDATE imageProperties
  SET value='75' WHERE element='img2' AND property='height';
");