I want to loop through the years and get the counts for each month on each year using below while loop . How can I achieve this by limited the number of years.
declare @start_year int=1999
declare @loop_year int
declare @end_year int=2015
WHILE (@end_year <2015)
BEGIN
Select count(*) as rows,month(create_datetime) as month, year(create_datetime) as year
FROM [table_name]
WHERE year(create_datetime) =@loop_year
GROUP BY month(create_datetime),year(create_datetime)
set @loop_year=@start_year+1
END
I think your WHILE
loop is messed up. You are declaring @end_year = 2015
and then saying WHILE (@end_year < 2015)
. I think you meant WHILE (@loop_year < @end_year)
.
With that said, there is no reason to use a loop for this particular case. This should accomplish the same results:
Select count(*) as rows,
month(create_datetime) as month,
year(create_datetime) as year
FROM [table_name]
WHERE year(create_datetime) BETWEEN 1999 AND 2014
GROUP BY month(create_datetime), year(create_datetime)
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