遇到查询最大数的问题
数据表字段2个
name num
name 字段存比如 aa bb cc 等等名字
num字段存 a:4:{i:2009;s:1:"0";i:2010;s:1:"0";i:2011;s:1:"0";i:2012;s:1:"1";}
这种序列字段
反序列化后是
array(
'2009'=>0,
'2010'=>0,
'2011'=>0,
'2012'=>1
)
和值是1
然后操作是要查询出 num 的和值最大的前10条记录,
如何去做?
------解决方案--------------------
如果是 mysql 数据库,那只能全部取出后,用程序排序
但若在入库时就已经求过和了,倒是可以用 mysql 的函数析出
如果是 sqlite 数据库,可以向其注册一个 php 函数来做
------解决方案--------------------
存json就是个悲剧。用php挨个搞吧
------解决方案--------------------
程序端判断试试。
------解决方案--------------------
全部取出进行判断

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