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Home Backend Development PHP Tutorial 问个SQL查询语句

问个SQL查询语句

Jun 23, 2016 pm 02:24 PM

有个客户表,其中一个字段里面存储的是电话号码,客户每买一次就登录一次电话号码,我现在想查询这个字段重复记录最多的,并且依次排列出来,这个SQL应该怎么写呢。

客户表名称 partylist
存储客户电话号码的字段是 phonum  varchar(15)

表的结构大概是这样

张三  北京   0108956878
李四  上海    021545787
小小   上海   13800138000
小四   上海   13800138000
小吴   广州   0205855843

比如查询出来的结果是

13800138000  29次 小王
020184587    18次  小李

这样的,谢谢各位


回复讨论(解决方案)

用这个试下:

SELECT *,count(phonum) as nums FROM partylist GROUP BY phonum ORDER BY nums DESC
Copy after login
Copy after login
Copy after login

用这个试下:

SELECT *,count(phonum) as nums FROM partylist GROUP BY phonum ORDER BY nums DESC
Copy after login
Copy after login
Copy after login


恩,可以,谢谢你,可以帮我解释下这个SQL么,我查询出来以后看到结果是加了一个字段NUMS

select *,count(phonum) //这个我知道,查询某个表的总数,但是那个逗号 ','我不知道是什么意思
AS我也知道,别名,然后后面是查询partylist这个表名

select username,userpass from.....这里的‘,’和他学的逗号作用一样的。




用这个试下:

SELECT *,count(phonum) as nums FROM partylist GROUP BY phonum ORDER BY nums DESC
Copy after login
Copy after login
Copy after login


恩,可以,谢谢你,可以帮我解释下这个SQL么,我查询出来以后看到结果是加了一个字段NUMS

select *,count(phonum)  //这个我知道,查询某个表的总数,但是那个逗号 ','我不知道是什么意思
AS我也知道,别名,然后后面是查询partylist这个表名
在sql的世界里,字段我们也可以看成是一个变量,是可以经过运算的,通过as赋值,就能得到数据。

非常感谢

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