I am wondering if it's possible (without actually parsing the given string) to get the actual range (in terms of days, minutes or seconds) that is specified when you have an SQL statement like
[select 'x'
from dual
where date between to_date('20111113152049')
and to_date('20120113152049')]
I am working on a query where I'm given a string in the form of
"between to_date(A) and to_date(B)"
and would like to get that value in days to compare to a policy we let the user set so they don't enter a date range longer than say a week.
Assuming you're looking for a theoretical answer (that is: don't take this into production) this could work:
Prerequistes:
have three tables: days_seq(day_seq), month_seq(mth_seq) and year_seq(yr_seq)
days has the numbers 1...31, month 1..12, years 2011....?
Use te following query (I used access because I don't have proper RDBMS available here, keep in mind that MS-ACCESS/JET is forgiving in the use of the Dateserial function, that is, it doesn't break when you ask the dateserial for february, 30th, 2012)
SELECT Max(DateSerial(
[year_seq]![yr_seq]
,[month_seq]![mth_seq]
, [days_seq]![day_seq]))
-
Min(DateSerial(
[year_seq]![yr_seq]
,[month_seq]![mth_seq]
,[days_seq]![day_seq])) AS days
FROM days_seq, month_seq, year_seq
WHERE DateSerial(
[year_seq]![yr_seq]
,[month_seq]![mth_seq]
,[days_seq]![day_seq])
BETWEEN #2012-02-1# AND #2012-02-28#
The query basically produces a carthesian product of three tables which generates all possible days in months, months in a year for as many years as you have in the years table.
Bonus:
You could off-course generate a permanent Calendar table as X-Zero suggests.
table calendar([date])
INSERT INTO calendar
SELECT DISTINCT DateSerial(
[year_seq]![yr_seq]
,[month_seq]![mth_seq]
, [days_seq]![day_seq]))
FROM days_seq, month_seq, year_seq
You still have to pick your start year and your end year wisely. According to the Maya's an enddate of december 21st, 2012 will do.
Related
I was reading through a couple of older posts and tried to apply the same logic to my question, I need to extract 13 months of data broken down per month, I would also like to apply the data to relevant headers... any suggestions. Please see code below and error received.
SELECT ST.TXDATE, ST.CODE, ST.QUANTITY
FROM StocTran ST
WHERE ST.TXDATE >= DATEADD(MONTH, -13, CAST(GETDATE() AS DATE))
ORDER BY ST.TXDATE
ERROR: [Elevate Software][DBISAM] DBISAM Engine Error # 11949 SQL
parsing error - Expected end of statement but instead found ( in
SELECT SQL statement at line 3, column 27 Error Code: 11949
DATEADD is a function in MS's TransactSQL for Sql Server. I do not know that DBIsam supports it, and it is not listed in DBIsam's list of supported functions here:
https://www.elevatesoft.com/manual?action=viewtopic&id=dbisam4&product=delphi&version=7&topic=functions
Generally, date functions are not portable across different SQL engines, and from that list, one possibility might be to use the EXTRACT function instead:
The EXTRACT function returns a specific value from a date, time, or timestamp value. The syntax is as follows:
EXTRACT(extract_value
FROM column_reference or expression)
EXTRACT(extract_value,
column_reference or expression)
Use EXTRACT to return the year, month, week, day of week, day, hours, minutes, seconds, or milliseconds from a date, time, or timestamp column. EXTRACT returns the value for the specified element as an integer.
The extract_value parameter may contain any one of the specifiers:
YEAR
MONTH
WEEK
DAYOFWEEK
DAYOFYEAR
DAY
HOUR
MINUTE
SECOND
MSECOND
Even if you are in a hurry, I strngly recommend that you study that page carefully.
UPDATE: From googling dbisam dateadd it looks like Elevate don't have a good answer for an equivalent to DATEADD. One of the hits is this thread:
https://www.sqlservercentral.com/Forums/Topic173627-169-1.aspx
which suggested an alternative way to do it using Delphi's built-in date functions (like IncMonth which I suggested you use in an answer to another q. Basically, you would calculate the start- and end-dates of a range of dates, then convert them to strings to construct a WHERE clause with a column date (from your db) which is equal to or greater than the start date and less or equal to the end date.
I'm currently struggling with how to produce a Fiscal Year parameter, so its values start with Current year, but also contain records from all previous years, and then have all following values be each following year.
So the Fiscal Year would look roughly like the following
Current (I would want to include all previous Fiscal years in this as well),
F18,
F19,
F20,
etc. etc.
As of right now, I have all fiscal years on the drop down, starting with the earliest fiscal year that exists in the database using the following query to populate the parameter dropdown.
SELECT DISTINCT FiscalConsideration FROM dbo.Currency
Which would look like this
F12,
F14,
F15,
F16,
F17,
F18,
etc. etc.
Then I filter the results based on the selected Fiscal year.
Question 1
Is there a way where I might be able to do this, have all records from current fiscal year and prior on one value and all individual fiscal years after?
Question 2
I have also discovered that I can't have this be multi-select AND accept NULL's as well. Might I be able to convert nulls to a custom string or something and have that be an option as well?
I ended up doing it by incorporating more of the logic I wanted into the computed column in SQL Server Management Studio with another case when for past records, and changing nulls with isnull to 'TBD'
I'm trying to create a query that will show the properties that were sold and were on the market for less than 6 weeks. In the listings table, there is BeginListDate and EndList Date.
So far my WHERE statement looks like
WHERE SaleStatus.Salestatus = 'Sold' AND DATEDIFF(YEAR,BeginListDate, EndListDate) >42
but that query is incorrect. I'm just confused on how to write a where statement where it only considers those that were on the market for less than 6 weeks.
Just to elaborate on #JamieD77's very correct comment...
Your condition:
DATEDIFF(YEAR,BeginListDate, EndListDate) >42
Says "The number of Years between the BeginListDate and the EndListDate is greater than 42". That's a hell of a long list period. You say you are looking for the the list period to be less than 42 days, so #JamieD77's suggestion to:
Datediff(day,BeginListDate, EndListDate) < 42
Is the right way to go. This says "The number of Days between beginlistdate and endlistdate is less than 42."
The difference here is the DatePart as #squillman suggested changing from Year to Day as well as the inequality itself. You wanted Less Than, <.
Hint but depended on how would you preferred in report or project.
this example and if both startdate and endate are in the same calendar week, the return value for week would be 0.
select DATEDIFF(week,getdate(),getdate()+7)
it has been consider week start for sunday based on system.
I am querying an Oracle 11.2 instance to build a small data mart that includes extracting the date of birth and date of death of people.
Unfortunately the INSERT query (which takes its data from a SELECT) fails due to ORA-01847 (day of month must be between 1 and last day of month).
To find my bad dates I first did:
SELECT extract(day FROM SOME_DT_TM),
extract(month FROM SOME_DT_TM),
COUNT(*)
FROM PERSON
GROUP BY extract(day FROM SOME_DT_TM), extract(month FROM SOME_DT_TM)
ORDER BY COUNT(*) DESC;
It gave me 367 rows, one for each day of the year including NULL and February-29th (leap year). True for the other date column as well, so it looks like the data is fine from a SELECT perspective.
However if I set logging up on my insert
create table registry_new_dates
(some_dob date, some_death_date date);
exec dbms_errlog.create_error_log('SOME_NEW_DATES');
And then run my long insert query:
SELECT some_dob,some_death_date,ora_err_mesg$ FROM ERR$_SOME_NEW_DATES;
I get the following weird results (first 3 rows shown) which makes me think that zip codes have been somehow inserted instead of dates for the 2nd column.
31-DEC-25 35244 "ORA-01847: day of month must be between 1 and last day of month"
13-DEC-33 35244-3402 "ORA-01847: day of month must be between 1 and last day of month"
23-JUN-58 35235 "ORA-01847: day of month must be between 1 and last day of month"
My question is - how do I detect these bad rows (there are 11 apparentlyh) with an SQL statement so I can fix or remove them. Fixing them in the originating table is not an option (no write privileges). I tried using queries like this:
SELECT DECEASED_DT_TM
FROM WH_CLN_PERSON
WHERE DECEASED_DT_TM LIKE '35%'
AND rownum<3;
But it did not find the offending rows.
Not sure if you are still actively researching this (or if you got an answer already).
To find the rows with the bad data, can't you instead select the DOB and the date of death, and express the WHERE clause in terms of DOB - like so:
...WHERE some_dob = to_date('31-DEC-25')
? After you find those rows, you may want to do another query on just one or two of those rows, including a calculated column: dump(date of death). Then post that. We can learn a lot from the dump - the internal representation of the so-called "date" (which may very well be a ZIP code instead). With that in hand we may be able to figure out what's stored, and how to hunt for it.
Long title, easy meaning:
How is it possible to extract from a date like "2014-04-04 10:47:30.000", which is stored in one column, it's components like year, month and day?
I'm not interested in the time.
For example, I have a table called "Incidents". Inside the table we got a column called "IncidentID" and a column called "ReportingDate", in which dates like the above-mentionend are stored. Let's say we have about 50k Incidents, therefore we have also 50k dates.
A year has 365 days. I want to query for the count of the Incidents, which were reported on different dates - for instance on the 5th of October 2013.
So: How can I get the components of the date and put them into another table while having own columns for the components and how can I query for the Incidents as well?
I guess at first I have to change the datatype of the date from DATETIME to DATE, but I'm not quite sure how to go further. May anyone help me while giving me a code and explains me what it does for a sql-noob? :-)
To achieve this
I want to query for the count of the Incidents, which were reported on
different dates - for instance on the 5th of October 2013.
you haven't do this:
I guess at first I have to change the datatype of the date from
DATETIME to DATE, but I'm not quite sure how to go further.
Just query
SELECT
IncidentID
FROM incidents
WHERE ReportingDate >= '20131005'
AND ReportingDate < '20131006'