yearBegin

yearBegin(X, [startingMonth=1], [offset], [n=1])

X is a scalar/vector of data type DATE, DATEHOUR, DATETIME, TIMESTAMP or NANOTIMESTAMP.

startingMonth (optional) is an integer between 1 and 12 indicating a month. The default value is 1.

offset (optional) is a scalar of the same data type as X. It must be no greater than the minimum value of X. The default value is the minimum value of X.

n (optional) is a positive integer. The default value is 1.

Return the first day of the year that X belongs to and that starts in the month of startingMonth.

If parameter offset is specified, the result is updated every n years. Parameter offset works only if parameter n>1.

yearBegin(2012.06.12, 10);
// output
2011.10.01

yearBegin(2012.06.12, 4);
// output
2012.04.01

yearBegin(2012.06.12);
// output
2012.01.01

yearBegin(2012.06.12, 1, 2009.04.03, 2);
// output
2011.01.01

date=2011.04.25+(1..10)*365
time = take(09:30:00, 10);
sym = take(`MSFT,10)
price= 49.6 29.46 29.52 30.02 174.97 175.23 50.76 50.32 51.29 52.38
qty = 2200 1900 2100 3200 6800 5400 1300 2500 8800 4500
t1 = table(date, time, sym, qty, price);

t1;

select avg(price),sum(qty) from t1 group by yearBegin(date, 10, 2010.10.01, 2);

Related functions: yearEnd, businessYearBegin, businessYearEnd