php mysql insert into while 意外终止
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ -->$result = mysql_query("SELECT uid , pid , cate FROM upcm"); while($rows = mysql_fetch_row($result)) { $arry = explode($sepr,$rows[2],5); $query = "INSERT INTO upcn(uid,pid,cate1,cate2,cate3,cate4,cate5) VALUES('$rows[0]','$rows[1]','$arry[0]','$arry[1]','$arry[2]','$arry[3]','$arry[4]')"; $result1 = mysql_query($query); if(!$result1) { echo "fail<br>"; } }
mysql_fetch_row($result)获取查询的结果,逐条处理,处理后写进一个新的表里面,但是每次执行while循环总是还没执行完程序就终止了,没有处理完数据,把insert into 换成printf(“**”);代替插入操作,会将程序正确执行完毕,而且每次运行程序插入的条数不一,有时多有时少,请问大侠们什么情况这是,苦恼啊..
------解决方案--------------------
。。
像你这种问题,肯定是要在cli模式下跑单条sql处理才靠谱啊!!!
至不济也要先把数据导出,然后导入,而不是这样做啊
参见select into
------解决方案--------------------
有几个问题需要注意排除:
1、php超时
2、web服务器超时
3、特殊字符未转义
4、count($array)
算法上可考虑:
每千条组装成多个VALUE的INSERT语句后插入
以分页方式逐段插入
直接使用SQL指令完成,而不经php转手
$sql =INSERT INTO upcn(uid,pid,cate1,cate2,cate3,cate4,cate5)
SELECT uid , pid
, substring_index(substring_index(cate,'$sepr',1),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',2),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',3),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',4),'$sepr',-1)
, substring_index(substring_index(cate,'$sepr',5),'$sepr',-1)
FROM upcm
SQL;

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