I have a query where I want to group by month and year, hence:
GROUP BY ... Month(Deductions.USDate), Year(Deductions.USDate) ...
But because of the GROUP BY, I need to use these things in the main select query, hence:
SELECT Month(Deductions.USDate)&"/"&Year(Deductions.USDate)
which gives me 8/2012, 11/2011 etc. Which is great, but it's a string, not a date, so I can't query against it properly.
I've tried doing something like the below, but am getting a type mismatch. What is wrong?
CDATE("1/"&Month(Deductions.USDate)&"/"&Year(Deductions.USDate)
I think you are looking for this:
DateSerial(Year(Deductions.USDate), Month(Deductions.USDate), 1)
This returns a date given a year and month, and the day is always set to 1.
Related
I am creating a tableau dashboard and it should load data according to the date the user enters. This is the logic that I am trying.
select distinct XX.ACCOUNT_NUM, (A.TOTAL_BILLED_TOT-A.TOTAL_PAID_TOT)/1000 arrears, ((A.TOTAL_BILLED_TOT-A.TOTAL_PAID_TOT)/1000 - XX.SUM_BILL ) TILL_REF_JUL20
FROM
(
select /*+ parallel (bill ,40 ) */ distinct account_num, sum(INVOICE_NET_mny + INVOICE_TAX_mny)/1000 SUM_BILL
from bill
where account_num in (Select account_num from MyTable)
and trunc(bill_dtm) > ('07-Aug-2021') –-Refmonth+1 month and 07 is a constant. Only month and year is changing
and cancellation_dtm is null
group by account_num
)xx , account a
where xx.ACCOUNT_NUM = A.account_num
Here is what I tried. First created a parameter called ref_Month. Then created a calculated field with this.
[Ref_Month]=MAKEDATE(DATETRUNC('year',(DATEADD('month', 1, [Ref_Month])), 07))
But I am getting an error. I am using a live connection. Is there any method to achive this?
I don't understand what this statement is trying to do:
[Ref_Month]=MAKEDATE(DATETRUNC('year',(DATEADD('month', 1, [Ref_Month])), 07))
If Ref_Month is a date, which it has to be for DATEADD to be a valid operation, why not make it the 7th of whatever starting month and year you are starting with? Then DATEADD('month',1, [Ref_Month]) will be a month later, still on the 7th. So you don't need DATETRUNC or MAKEDATE at all.
That said, how, when, and where are you trying to COMPUTE a PARAMETER,
let alone based on itself?
I am trying to fix a query that has come to light in SSRS after the new year. We have an input that comes from another application. It grabs a date and stores it as varchar. The SSRS report then fetches the top 100 'dates' but when 2017 dates have come around, this are not in the top 100.
The existing query is as follows
SELECT DISTINCT TOP (100)
FROM DenverTempData
ORDER by BY Date DESC
The date is stored as VARCHAR. So obviously this query doesn't grab a value such as 01012017 as being a top 100 (over values likes 12312016). I thought maybe I can simply change the datatype on this column to datetime. But the information comes from a flat file and is converted, so it's a little more difficult that that. So I'm hoping to do a select of the distinct top 100 while converting the date column to datetime or just date and grabbing the last 100 dates.
Can someone help with the query syntax? I'm thinking a cast to convert varchar to date, but how do I format with distinct top 100? I'm simply looking to retrieve the last 100 dates in chronological order from a column that is stored as varchar but contains a string representing a date.
Hopefully that makes sense
It is always a bad idea to store a date as string. This is highly culture specific!
You can cast your formatted string-date to a real date like this:
DECLARE #DateMMDDYYYY VARCHAR(100)='12312016';
SELECT CONVERT(DATE,STUFF(STUFF(#DateMMDDYYYY,5,0,'-'),3,0,'-'),110)
After the conversion your sorting (and therefore the TOP 100) should work as expected.
My strong advise: Try to store your dates in a column of a real date type to avoid such hassel!
SELECT DISTINCT TOP 100 (CAST(VarcharColumn as Date) as DateColumn)
FROM TABLE
Order by DateColumn desc
I'm working with a data set that has a date column in the form of string. I thought it would a simple by doing something like this:
to_date(date_of_birth,'YYYY-01-01')
date_of_birth is in the format DD/MM/YYYY, and is of type 'text'
HOWEVER, I stumbled upon some crazy cases where you have information like
//1980
Another case was:
0/0/1980
When I run my solution, I receive the following error:
ERROR: invalid value "//19" for "YYYY"
DETAIL: Value must be an integer.
My goal actually is simply to collect the year, since that's at least consistent. How do you handle such cases with Postgres?
EDIT:
Switched it to the following:
to_date(date_of_birth,'01/01/YYYY')
My query is this:
SELECT to_date(date_of_birth,'01/01/YYYY') AS year, COUNT(*) AS yearTotal FROM student WHERE date_of_birth LIKE '%/%/1980' GROUP BY year;
The result turns out like this:
year | yeartotal
---------------+-----------
0030-01-01 | 3
0001-01-01 BC | 1
The problem through manipulating the date information (which was of type string) into 'YYYY' in order to access the proper information through date_part.
Using PostgreSQL's "right" function, I was able to collect the year from the string written in the format "DD/MM/YYYY", where right('10/12/2013',4) will return '2013'.
My query looked like this:
SELECT date_part('year', to_date(right(date_of_birth,4),'YYYY')) AS year, COUNT(*) AS total FROM student GROUP BY year
Another way I could've solved the problem was through regex by ensuring that I only work with 'valid' date statements. Something along the line of (using Python regex as an example):
regexp_matches(date_of_birth, '.\/.\/\d{4}')
try TO_CHAR instead of TO_DATE, it worked for me
SELECT replace(date_of_birth,'//','') AS year, COUNT(*) AS yearTotal FROM student GROUP BY year;
I've been looking into making a date selector so instead of filtering by Month, Week by adding filters then displaying the quick filters to correspond. I want to be able to dynamically change the date so I can choose between Quarter, Month and Week in a single drop down.
I have made the selector part no problem it shows but when I come to my calculated field, it's not behaving how I would like.
Here is my calculated field:
CASE [Parameters].[Date Select]
WHEN 'Quarter' THEN QUARTER([Date])
WHEN 'Month' THEN MONTH([Date])
WHEN 'Week' THEN WEEK([Date])
END
This gives 2 errors...
Unknown Function QUARTER called
Unknown Function WEEK called
I am puzzled because the month one is fine.
Normally in tableau to get the month/quarter/week, I click on the Date dimension and select Month or week and it filters and displays like so: MONTH(Date).
Can anyone tell me where I'm going wrong and how I can pull the week and quarter from date in the calculated field so my selector will work.
Thanks.
There are no QUARTER and WEEK functions in Tableau, as you can see in the image below.
What you should be using to get these values are:
DATEPART('quarter',[Date])
DATEPART('week',[Date])
For filtering the date using your parameter as filter, I'll assume that you want to filter the current quarter, month or week. In this case you'll need to setup your paramaters like this:
Then you'll create a Calculated Field with the following formula:
DATEPART([Date Selector],[Date]) = DATEPART([Date Selector],TODAY())
This should give you a True/False dimension which you will use as filter for the value True. After that you should have a working parameter filtering your data accordingly to the value set.
I need to filter my query with different time intervals like that:
...
where
date >= '2011-07-01' and date <='2011-09-30'
and date >='2012-07-01' and date >='2012-09-30'
I suppose such code is not good, because these dates conflicts with each other. But how to filter only these two intervals, skipping everything else? Is it even possible? Because if I query like this, I don't get any results.I tried to use BETWEEN, but it does same thing.
I bypassed this by extracting quarters from years and calculating only third quarter. But then other quarters sum is showed as zero and I can't ignore these rows that have sum column with zero value. I tried to filter where price > 0 (column where sum goes), but it says that column do not exist. So I put it whole FROM under '('')' brackets to make it calculate sum before where clause, but it still does give me error that such column do not exist.
Also if you need to see query I have now, I can post it, just tell me if it is needed.
I want to do this, because I need to compare third quarter of two different years (maybe I should use another approach).
You're not going to get any results because you can't have a date that's both within 7/1/2011 through 9/30/11 and after 7/1/2012 and after 9/30/12.
You can have a date that is either between 7/1/20122 and 9/30/2011 or between 7/1/2012 and 9/30/2012.
SELECT col1 FROM table1
WHERE date BETWEEN '7/1/2011' AND '9/30/2011' OR date BETWEEN '7/1/2012' AND '9/30/2012';