SQL仅返回最大值

Question

I have done some basic queries using max but this one has a little more to it. I am using SSMS 2012. This would also need to include a group or distinct.

Select statement -

select A.YEAR1, A.PERIODID 
from GPSTJ..SY40100 A
where A.CLOSED = 0 and A.PERIODID <> 0 and A.series = 5

This returns the following results -

YEAR1    PERIODID
2015     12
2015     12
2016     1
2016     1
2016     2
2016     2

I only want it to return 1 row, with the maximum value in the year column first, and then the maximum Period ID -

YEAR1    PERIODID
2016     2

Thanks

Answer 1

Just ordering with TOP (1)

select TOP (1) A.YEAR1, A.PERIODID 
from GPSTJ..SY40100 A
where A.CLOSED = 0 and A.PERIODID <> 0 and A.series = 5
ORDER BY A.YEAR1 DESC, A.PERIODID DESC

Answer 2

You would use MAX() so use SELECT MAX(YEAR1), PERIODID FROM table;

This will select the highest value in the column.

Answer 3

你可以尝试having条款， group by一年，时间ID