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mysql数据库,在查询列名里子查询一列由两列组合去重的个数如何实现?

WBOY
WBOYOriginal
2016-06-06 09:40:131478browse

mysqlsql数据库

需求:数据库有:列1----列2----
127.0.0.1-----123-----
127.0.0.1-----123-----
127.0.0.1-----123-----
124.254.42.38----541---
去除重复后结果
127.0.0.1---123
124.254.42.38----541
然后如何获得个数。

自己想了一下写出来后有错
select
( select
DISTINCT 列1,列2
FROM
table
),count(*)
FROM
table

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