如何统计一个group by query返回的记录数,
How do I count the number of records returned by a group by query,
例如:
select count(*)
from temptable
group by column_1, column_2, column_3, column_4
给我,
1
1
2
我需要数一下上面的记录,得到 1+1+1 = 3.
I need to count the above records to get 1+1+1 = 3.
您可以在另一个 COUNT 上使用 OVER 子句在一个查询中执行这两项操作
You can do both in one query using the OVER clause on another COUNT
select
count(*) RecordsPerGroup,
COUNT(*) OVER () AS TotalRecords
from temptable
group by column_1, column_2, column_3, column_4
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