在sqlite中检索最新日期的记录

Question

我在SQLite3中有此表price_date 。

id    info_id       price       date
"661"   "1"         "15.99"     "2018-10-15"
"1334"  "1"         "18.52"     "2018-10-01"
"439"   "2"         "24.48"     "2018-10-15"
"1113"  "2"         "25.97"     "2018-10-01"
"2"     "6"         "0.64"      "2018-10-15"
"678"   "6"         "0.66"      "2018-10-01"

我想检索具有最新日期的记录，以使输出看起来像这样；

id    info_id       price       date
"661"   "1"         "15.99"     "2018-10-15"
"439"   "2"         "24.48"     "2018-10-15"
"2"     "6"         "0.64"      "2018-10-15"

关于开始编写sql代码的任何提示？

Answer 1

使用相关子查询

   select * from price_date t 
   where t.date = 
    ( select max(date) from price_date t1 
   where t1.info_id=t.info_id
     )

Answer 2

使用相关子查询

select * from tablename t1 where date in
(select max(date) from tablename t2 where t1.info_id=t2.info_id)