仅从日期获得月份和年份

Question

I want get only year, and only numeric month from date, I try this for month by i get char month, how can i get numeric month, and year ?

select to_char(dateper,'MON') 
from calcul
 group by dateper

Answer 1

You can get a numeric representation in a string by using:

select extract(year from dateper) as yyyy, extract(month from dateper) as mm
from calcul
group by yyyy, mm;

Or:

select to_char(dateper, 'YYYY-MM') 
from calcul
group by to_char(dateper, 'YYYY-MM') ;

Answer 2

Month:

SELECT date_part('month', now())::integer;

Year:

SELECT date_part('year', now())::integer;

Answer 3

You can try this one:

datename(m,column)+' '+cast(datepart(yyyy,column) as varchar) as MonthYear

or

select to_char(DATEFIELD,'MON') from YOUR_TABLE

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