[英]Aggregate function along other records
假设我要获取表T1
所有记录。 另外,我需要访问记录的min
和max
日期值。
我可以使用两个查询来做到这一点:
select * from T1 ;
select min(created_at) as min_date,max(created_at) as max_date from T1;
这是两个单独的查询,但是可以将它们合并在一个查询中吗?
我的意思是所有记录加上特定列的最小值和最大值。
select *,
(select min(created_at) from T1) as min_date,
(select max(created_at) from T1) as max_date
from T1;
SELECT * FROM `T1` JOIN (SELECT MIN(`created_at`) AS min_date,
MAX(`created_at`) AS max_date FROM `T1` ) AS temp
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