Like I have a group of data of different dates and I want to have data between two particular date like start date and end date and I want data between these two dates. And I don't really have any idea how to do so can I get any insight about it..
const start_date = new Date(item.start_date).getTime();
const end_date = new Date(item.end_date).getTime();
const diff = end_date - start_date;
Now you have the different of two dates in timestamp type. You can check here for more information about timestamp https://en.wikipedia.org/wiki/Unix_time
Related
I'm using spark 2.4.5. I want to add two new columns, date & calendar week, in my pyspark data frame df.
So I tried the following code:
from pyspark.sql.functions import lit
df.withColumn('timestamp', F.lit('2020-05-01'))
df.show()
But I'm getting error message: AssertionError: col should be Column
Can you explain how to add date column & calendar week?
Looks like you missed the lit function in your code.
Here's what you were looking for:
df = df.withColumn("date", lit('2020-05-01'))
This is your answer if you want to hardcode the date and week. If you want to programmatically derive the current timestamp, I'd recommend using a UDF.
I see two questions here: First, how to cast a string to a date. Second, how to get the week of the year from a date.
Cast string to date
You can either simply use cast("date") or the more specific F.to_date.
df = df.withColumn("date", F.to_date("timestamp", "yyyy-MM-dd"))
Extract week of year
Using format date allows you to format a date column to any desired format. w is the week of the year. W would be the week of the month.
df = df.withColumn("week_of_year", F.date_format("date", "w"))
Related Question: pyspark getting weeknumber of month
I have 2 dates one is stored inside my date and for other date I am using calculated column in order to store the end date into that, how an I calculate the difference in time period between those dates, I need the date period between all those dates is that possible with DAX?
How can I use calculated column inside my DAX and also I dont have a calender table inside my database.
2019-05-31 and end date is 2019-06-03 then the difference will give me 3 dates that is 2019-05-31,2019-06-01 2019-06-02 and 2019-06-03
Totally possible and easy. If you just need the difference between dates in two columns you can create a calculated column using the following:
DateDiff =
DATEDIFF ( 'Table'[Date1], 'Table'[Date2], DAY )
This will take the difference between Date1 and Date2 in days.
DECLARE #start_date [date] = CAST(‘2012-08-01’ as [date])
DECLARE #end_date [date] = CAST(‘2012-09-01’ as [date])
SELECT
DATEADD(day, [v].[number], #start_date)
FROM
[master].[dbo].[spt_values] [v]
WHERE
[v].[type] = ‘P’ AND
DATEADD(day, [v].[number], #start_date) <= #end_date
In the image I have a dataframe.In that I have a column called timestamp ,from that I want to seperate month and have to make it as a new column.How to do that?
If your Timestamp is not already datetime than convert like so:
df["Timestamp_converted"] = pd.to_datetime(df["Timestamp"], format="%Y-%m-%d %H:%M:%S")
You get the month as a separate column with this:
df["month"] = df.Timestamp_converted.dt.month
i would like to know how to structure a timestamp field in Firestore in order to do specific queries like:
Get all the documents with the same hour in a month
Retrieve timestamp from firebase and compare with required hour.If document matches add the document to an array.Finally after comparing with all documents your array contains only documents with same hour in a month
Date month = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(month.getTime());
calendar.add(Calendar.MONTH, -6);
final String date = String.valueOf(document.get("OrderPlacedDateTime"));
if(date.contains((CharSequence) year)) {
//add to array
}
I did this in android idea might be helpful.
I have the below set of records in Google Sheets. I would like to filter the rows with specific name and date range. Once I have the filtered data, I would like to fetch the last row's final amount cell data.
Ex: I would like to fetch final amount as 300 if my date(dd/mm/yyyy) range is 01/01/206 to 11/06/2016 and Name selection is 'Sandeep'.
As I have experience SQLite db, I have inserted the same records in DB and got the expected result using the below query.
select Final from MyTable where Date in (select max(Date) from MyTable WHERE Date BETWEEN '01/01/2016' AND '11/06/2016' and name = "Sandeep")
But I am not getting idea how to use multiple select statements in google sheets. It is ok for me to get result using any other way. So please help me to get the result as explained above.
= QUERY (A1:E50,"Select F where A > date '2016-1-1' and A < date '2016-6-11' and B ='Sandeep' order by A desc limit 1")
Use Column IDs A,B,C instead of name, income. Multiple columns can be given in a single Select clause separated by a ,
Dates in where clause should be written in yyyy-mm-dd format only(regardless of the format of dates in actual column)
See if this works
=index(E:E, max(filter(row(A:A), A:A>date(2016, 1, 1), A:A<date(2016, 6, 11), B:B="Sandeep")))
If you want to include start and end date, change > to >= and < to <=.