mysql 如果某一个字段相同那么取创建时间最新的那条数据的sql语句

SELECT

t1.id,

t1.station_name as stationName,

t1.calculated_value_name as calculatedValueName,

t1.value,

t1.created,

CAST((t1.value+50) AS DECIMAL(12,3)) as limitValue

FROM d_full_limit_transmission_line t1

INNER JOIN (

SELECT

SUBSTRING_INDEX(

group_concat(id ORDER BY created DESC),

',',

1

) AS id

FROM

d_full_limit_transmission_line

GROUP BY

unique_identification

) t2 ON t1.id = t2.id

WHERE

t1.STATUS = 1

AND t1.is_deleted = 0

AND t1.is_enable = 1

AND t1.calculated_value_name is not NULL