sql - Group by clause - output is not as expected -


below sql query list of dates table.

select t2.counter_date mydates table1 t1;

output:

mydates  2014-03-14 00:00:00 2014-05-11 00:00:00 2014-11-03 00:00:00 2014-12-23 00:00:00 2015-01-12 00:00:00 2015-08-08 00:00:00 2016-03-14 00:00:00 2017-03-14 00:00:00 2017-03-19 00:00:00

below solution:

select min(t1.counter_date) olddate,max(t1.counter_date) latestdate table1 t1;

in following demo can see query giving correct results. problem must in data.

edit: after edit clear problem is. once perform following query:

select min(date), max(date) tab group date

than min(date) has equal max(date) since there 1 date in group.


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