businessMonthBegin
Syntax
businessMonthBegin(X, [offset], [n=1])
Arguments
X is a scalar/vector of data type DATE, DATEHOUR, DATETIME, TIMESTAMP or NANOTIMESTAMP.
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.
Details
Return the first business day (Monday to Friday) 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
businessMonthBegin(2018.09.12);
// output
2018.09.03
businessMonthBegin(2018.09.12, 2018.07.12, 3);
// output
2018.07.02
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 businessMonthBegin(date,2016.01.01,2);| businessMonthBegin_date | avg_price | sum_qty |
|---|---|---|
| 2016.05.02 | 39.53 | 4100 |
| 2016.07.01 | 29.77 | 5300 |
| 2016.09.01 | 175.1 | 12200 |
| 2016.11.01 | 50.54 | 3800 |
| 2017.01.02 | 51.835 | 13300 |
Related functions: businessMonthEnd, monthBegin, monthEnd, semiMonthBegin, semiMonthEnd