mysql - MySql select statement (select distinct) issues

Question

So I have a schema that goes something like this

Historical -- Table
--CID
--ID
--LOCATION --STATUS
--TIME

CID doesn't matter for this, but I do want to get the 1 oldest TIME (TimeStamp) for each ID

So what I'm trying to do is something like

SELECT DISTINCT(id) from Historical order by TIME asc limit 1 But where I get each ID, and the oldest time for it.

Thanks

Answer 1

这是做你想做的吗？

SELECT id, min(time) FROM Historical GROUP BY id;

Answer 2

SELECT id, MIN(TIME) FROM Historical GROUP BY id;

这将选择不同的 ID（通过分组）和每个分组 ID 的 MIN TIME。