monthEnd
Syntax
monthEnd(X, [offset], [n=1])
Arguments
X is a scalar/vector of data type DATE, DATEHOUR, DATETIME, TIMESTAMP or NANOTIMESTAMP.
offset 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 is a positive integer. The default value is 1.
Details
Return the last day of the month that X belongs to.
If parameter offset is specified, the result is updated every n months. Parameter offset works only if parameter n>1.
Examples
$ monthEnd(2012.06.12);
2012.07.31
$ date=2016.04.12+(1..10)*30
$ 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;
date |
time |
sym |
qty |
price |
---|---|---|---|---|
2016.05.12 |
09:30:00 |
MSFT |
2200 |
49.6 |
2016.06.11 |
09:30:00 |
MSFT |
1900 |
29.46 |
2016.07.11 |
09:30:00 |
MSFT |
2100 |
29.52 |
2016.08.10 |
09:30:00 |
MSFT |
3200 |
30.02 |
2016.09.09 |
09:30:00 |
MSFT |
6800 |
174.97 |
2016.10.09 |
09:30:00 |
MSFT |
5400 |
175.23 |
2016.11.08 |
09:30:00 |
MSFT |
1300 |
50.76 |
2016.12.08 |
09:30:00 |
MSFT |
2500 |
50.32 |
2017.01.07 |
09:30:00 |
MSFT |
8800 |
51.29 |
2017.02.06 |
09:30:00 |
MSFT |
4500 |
52.38 |
$ select avg(price),sum(qty) from t1 group by monthEnd(date,2016.01.31,2);
monthEnd_date |
avg_price |
sum_qty |
---|---|---|
2016.05.31 |
49.6 |
2200 |
2016.07.31 |
29.49 |
4000 |
2016.09.30 |
102.495 |
10000 |
2016.11.30 |
112.995 |
6700 |
2017.01.31 |
50.805 |
11300 |
2017.03.31 |
52.38 |
4500 |
Related functions: monthBegin, businessMonthBegin, businessMonthEnd, semiMonthBegin, semiMonthEnd