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Home Backend Development PHP Tutorial order by btcount desc或 order by btcount失效,还有什么排序写法吗?

order by btcount desc或 order by btcount失效,还有什么排序写法吗?

Jun 23, 2016 pm 02:14 PM

select * from table where yz='1' order by btcount desc这样写输出不对,

btcount这个字段很短,一般都是=0或=1,最大不超过=8

当数据量大时,就不能按btcount值的大于排列了,不知道为什么?

按time又能正确排序的:select * from table where yz='1' order by time desc

就是按btcount不能正确排序,难道是因为btcount字段长度太短了?

但在phpmyadmin中点击升序、降序又有效的,想知道phpmyadmin中难道不是用order by 来升序、降序的吗?


user     btcount         time       id
aaa        0        1359119507       1
bbb        2        1359119506       2
ccc        0        1359119502       4
ddd        1        1359119501       6
eee        0        1359119467       7
fff        3        1359119467       9
ggg        2        1359116785       13
hhh        0        1359119687       15

请高手教我怎么写能正确输出?


回复讨论(解决方案)

select * from table where yz='1' order by btcount desc

yz字段在哪里?

select * from table where yz='1' order by btcount desc

yz字段在哪里?

因为yz都等于,所以下面的表中我就没打上,与这个无关

那你看看phpmyadmin是怎么写的吧。正常你点了按钮,上面会有相应的sql代码的。

那你看看phpmyadmin是怎么写的吧。正常你点了按钮,上面会有相应的sql代码的。

看了,那个太复杂了,看不懂,所以才来请教高手的。


那你看看phpmyadmin是怎么写的吧。正常你点了按钮,上面会有相应的sql代码的。

看了,那个太复杂了,看不懂,所以才来请教高手的。
那你把sql代码贴出来啊。你不贴出来谁知道是什么原因。

那你把sql代码贴出来啊。你不贴出来谁知道是什么原因。

不是写了吗:
select * from table where yz='1' order by btcount desc


那你把sql代码贴出来啊。你不贴出来谁知道是什么原因。

不是写了吗:
select * from table where yz='1' order by btcount desc



光看代码没问题啊。
要不试试

select * from `table` where yz='1' order by btcount desc
Copy after login
Copy after login

光看代码没问题啊。
要不试试

select * from `table` where yz='1' order by btcount desc
Copy after login
Copy after login


没用,要是简单我就不问了,谢谢你了,请你不要回复了,等待高手吧!

看代码是没问题的,贴建表及插入语句看看。

explain 一下你的语句。
另外btcount是 int, var还是什么格式?

explain 一下你的语句。
另外btcount是 int, var还是什么格式?

字段 类型 Null 默认
btcount int(6) 否 0

不知你想输出什么
对于你主贴所谓查询语句和数据,能得到一下结果

user     btcount         time       idfff        3        1359119467       9bbb        2        1359119506       2ggg        2        1359116785       13ddd        1        1359119501       6aaa        0        1359119507       1ccc        0        1359119502       4eee        0        1359119467       7hhh        0        1359119687       15
Copy after login
Copy after login

不知你想输出什么
对于你主贴所谓查询语句和数据,能得到一下结果

user     btcount         time       idfff        3        1359119467       9bbb        2        1359119506       2ggg        2        1359116785       13ddd        1        1359119501       6aaa        0        1359119507       1ccc        0        1359119502       4eee        0        1359119467       7hhh        0        1359119687       15
Copy after login
Copy after login


谢谢,就想要这输出效果,代码是?

select * from table order by btcount desc

你最好把 
explain select * from table where yz='1' order by btcount desc
这个结果贴出来

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