MySQL获取最新一条记录

方法一：

SELECT
*
FROM
table_name AS ta
WHERE
ta.唯一键 = ( SELECT max( tb.唯一键 ) FROM table_name AS tb WHERE ta.判断重复的列 = tb.判断重复的列 );

方法二：

select  b.* from (select a.* from tableA a order by a.create_time desc) tableB b group by b.判断重复的列;