Question

我有sql语句在mysql中运行很好，我正在使用datediff。当我尝试在php中使用它时，我得到一个“mysql_fetch_arrary（）期望参数1是一个资源，布尔值在”

中给出

这句话是......

$result = mysql_query("select hname, hsn, hmodel, hmake, htype, hwar, datediff(`hwar`, now()) from host where stype='physical';",$db);

我知道该语句适用于mysql

mysql> select hname, hsn, hmodel, hmake, htype, hwar, datediff(`hwar`, now()) from servers.host where stype='physical';
+--------------+---------+--------+-----------+-------+------------+-------------------------+
| hname        | hsn     | hmodel | hmake     | htype | hwar       | datediff(`hwar`, now()) |
+--------------+---------+--------+-----------+-------+------------+-------------------------+
| moscow       | XXXXXXX | Dell   | PowerEdge | R710  | 2013-09-13 |                     225 |
| sydney       | XXXXXXX | Dell   | PowerEdge | R710  | 2013-09-15 |                     227 |

当我删除datediff( hwar , now())时，我的页面正常运行。我想将其用作字段

$datediff=$row['datediff'];

关于它为什么不起作用的任何线索？

Answer 1

尝试在查询中设置限制

   $result = mysql_query("select hname, hsn, hmodel, hmake, htype, hwar, datediff(`hwar`, now()) as dif from host where stype='physical' LIMIT 0,10 ;",$db);

看this post

Answer 2

试试这个：

替换这段sql语句：datediff（hwar，now（））

使用：datediff（hwar，now（））作为Diffdate

以这种方式恢复： $ DATEDIFF = $行[ 'Diffdate'];

Bye XD

Answer 3

您应该为选择器添加别名：

select hname, hsn, hmodel, hmake, htype, hwar, datediff(`hwar`, now()) AS diff from host where stype='physical';

然后您可以访问名为'diff'

的列

在PHP中导致错误

3 个答案: