MySQL 去除重复数据实例详解

select distinct  from t;

select  from t t1

 where t1.id =

 (select min(t2.id)

  from t t2

  where t1.name = t2.name and t1.address = t2.address);

select t1.

 from t t1,

   (select name, address, min(id) id from t group by name, address) t2

 where t1.id = t2.id;

 

select t.id, t.name, t.address

 from (select id, name, address,

row_number() over (distribute by name, address sort by id) as rn 

     from t) t 

 where t.rn=1;