mysql - sql如何进行多个字段去重?

Question

如图,我有 这样一份数据

字段比较多,大约有30个多字段.
我想根据宝贝id 和 日期进行去重处理. 简单的说就是2列去重
我查了一下distinct方法是去重的
但是我执行了如下语句
SELECT distinct 宝贝id FROM taobao.jutiliushi;

恩所有的字段都没了~,我不知道网上找到这种去重的方法有什么意义~

所以想问下,假如我想针对多个字段去重,同时又能保持表的结构?怎么处理?

Answer 1

What you need isgroup by

select * from taobao.jutiliushi group by 宝贝id;

Answer 2

select distinct id, date,....column name from table name

Answer 3

SELECT DISTINCT(baby id) AS id, date, baby title,... FROM table name;

Answer 4

You only selected the baby id, and of course the result will only be the baby id

Answer 5

SELECT * FROM (SELECT * FROM `表A` GROUP BY 去重字段1) as aa GROUP BY aa.去重字段2