I'm trying to run a query against 3 different fields. I want it to return all the accounts that meet the first range, bring back all accounts that meet the second range and same for the third. I tried using and but get dates outside of the range.
select
*
from
Permits
where
created between '1/1/2015' and '1/21/2015'
and updated between '1/1/2015' and '1/21/15'
and noResponseDateSet between '1/1/15' and '1/21/15'
order by
alarmNo
Thanks for helping me
Use ISO standard date formats:
select created, updated, noResponseDateSet
From Permits
where created between '2015-01-01' and '2015-01-21' and
updated between '2015-01-01' and '2015-01-21' and
noResponseDateSet between '2015-01-01' and '2015-01-21' ;
This should fix the problem, unless you have one combination of rather arcane international date settings.
CONVERT can do the dirty parsing work for you. It will accept 1/1/2015 or 01-01-2015 or most other combinations.
select *
From Permits
where created between CONVERT(DATETIME,'1/1/2015') and CONVERT(DATETIME,'1/21/2015')
and updated between CONVERT(DATETIME,'1/1/2015') and CONVERT(DATETIME,'1/21/15')
and noResponseDateSet between CONVERT(DATETIME,'1/1/15') and CONVERT(DATETIME,'1/21/15')
order by alarmNo
Related
I'm try to count distinct value in some columns in a table.
i have a logic and i try to write in 2 way
But i get diffent results from this two query.
Can any one help to clarify me? I dont know what wrong is code or i think.
SQL
select count(distinct membership_id) from members_membership m
where date_part(year,m.membership_expires)>=2019
and date_part(month,m.membership_expires)>=7
and date_part(day,m.membership_expires)>=1
and date_part(year,m.membership_creationdate)<=2019
and date_part(month,m.membership_creationdate)<=7
and date_part(day,m.membership_creationdate)<=1
;
select count(distinct membership_id) from members_membership m
where m.membership_expires>='2019-07-01'
and m.membership_creationdate<='2019-07-01'
;
I actually think that this is the query you intend to run:
SELECT
COUNT(DISTINCT membership_id)
FROM members_membership m
WHERE
m.membership_expires >= '2019-07-01' AND
m.membership_creationdate < '2019-07-01';
It doesn't make sense for a membership to expire at the same moment it gets created, so if it expires on midnight of 1st-July 2019, then it should have been created strictly before that point in time.
That being said, the problem with the first query is that, e.g., the restriction on the month being on or before July would apply to every year, not just 2019. It is difficult to write a date inequality using the year, month, and day terms separately. For this reason, the second version you used is preferable. It is also sargable, meaning that an index on membership_expires or membership_creationdate can be used.
There is an issue with the first query:
select count(distinct membership_id) from members_membership m
where date_part(year,m.membership_expires)>=2019
and date_part(month,m.membership_expires)>=7
and date_part(day,m.membership_expires)>=1
and date_part(year,m.membership_creationdate)<=2019
and date_part(month,m.membership_creationdate)<=7
and date_part(day,m.membership_creationdate)<=1; -- do you think that any day is less than 1??
-- this condition will be satisfy by only 01-Jul-2019, But I think you need all the dates before 01-Jul-2019
and date_part(day,m.membership_creationdate)<=1 is culprit of the issue.
even membership_creationdate = 15-jan-1901 will not satisfy above condition.
You need to always use date functions on date columns to avoid such type of issue. (Your second query is perfectly fine)
Cheers!!
The reason could be due to a time component.
The proper comparison for the first query is:
select count(distinct membership_id)
from members_membership m
where m.membership_expires >= '2019-07-01' and
m.membership_creationdate < '2019-07-02'
--------------------------------^ not <= ---^ next day
This logic should work regardless of whether or not the "date" has a time component.
I have been trying to retrieve the rows registered between two dates (since every time a person goes through a door a row is inserted). This way we get the "amount of visitors" on a monthly basis.
When querying the following:
select MOV_DATAHORA from LOG_CREDENCIAL
WHERE MOV_DATAHORA>'2017-01-01'`
a total of 5851 rows are shown. This is an example of a row:
2017-01-05 21:33:30.000
However when trying the following:
select MOV_DATAHORA from LOG_CREDENCIAL
WHERE MOV_DATAHORA>'2017-01-01'
AND MOV_DATAHORA<'2017-01-02'
0 rows are shown. I even tried the count(MOV_DATAHORA) statement but it still isn't working. I also tried with the BETWEEN statement unsuccessfully. Any ideas why?
Well... the simplest explanation based on your query predicate:
WHERE MOV_DATAHORA > '2017-01-01'
AND MOV_DATAHORA < '2017-01-02'
is that on January 1st (right after the New years) there were no visitors.
You are comparing a DateTime and a Date data types. Your table has a DateTime as you can see the 21:33:30.000 after the date, to convert and compare like types do the following.
SELECT MOV_DATAHORA FROM LOG_CREDENCIAL WHERE DATE(MOV_DATAHORA)>'2017-01-01'
AND DATE(MOV_DATAHORA)<'2017-01-02'
or using between
SELECT MOV_DATAHORA FROM LOG_CREDENCIAL WHERE DATE(MOV_DATAHORA) BETWEEN '2017-01-01'
AND '2017-01-02'
I have a table called tableA with TrasactionDate as one field. I have a particular date called myfixeddate (say it's 2014-03-08).
I want to get the TransactionDate within 4 months, but only before my fixed date myfixeddate ('2014-03-08') from the tableA. Say my query should give '2014-03-06','2014-03-05','2014-02-01',....
But when I use the following query :
SELECT TrasactionDate
FROM tableA
WHERE datediff(mm,Transdate,myfixeddate) < 4
It gives the TransactionDate in both ways (before and after). That means the result gave '2014-03-10','2014-03-18' with the wanted ones like '2014-03-05',....
Could you please tell me how to prevent this and what code I need to use to get the TransactionDate in one direction?
You may try like this:
Select TrasactionDate from tableA
where [TrasactionDate] between DATEADD(month, -4, myfixeddate) and myfixeddate
I am trying to query my postgresql db to return results where a date is in certain month and year. In other words I would like all the values for a month-year.
The only way i've been able to do it so far is like this:
SELECT user_id
FROM user_logs
WHERE login_date BETWEEN '2014-02-01' AND '2014-02-28'
Problem with this is that I have to calculate the first date and last date before querying the table. Is there a simpler way to do this?
Thanks
With dates (and times) many things become simpler if you use >= start AND < end.
For example:
SELECT
user_id
FROM
user_logs
WHERE
login_date >= '2014-02-01'
AND login_date < '2014-03-01'
In this case you still need to calculate the start date of the month you need, but that should be straight forward in any number of ways.
The end date is also simplified; just add exactly one month. No messing about with 28th, 30th, 31st, etc.
This structure also has the advantage of being able to maintain use of indexes.
Many people may suggest a form such as the following, but they do not use indexes:
WHERE
DATEPART('year', login_date) = 2014
AND DATEPART('month', login_date) = 2
This involves calculating the conditions for every single row in the table (a scan) and not using index to find the range of rows that will match (a range-seek).
From PostreSQL 9.2 Range Types are supported. So you can write this like:
SELECT user_id
FROM user_logs
WHERE '[2014-02-01, 2014-03-01]'::daterange #> login_date
this should be more efficient than the string comparison
Just in case somebody land here... since 8.1 you can simply use:
SELECT user_id
FROM user_logs
WHERE login_date BETWEEN SYMMETRIC '2014-02-01' AND '2014-02-28'
From the docs:
BETWEEN SYMMETRIC is the same as BETWEEN except there is no
requirement that the argument to the left of AND be less than or equal
to the argument on the right. If it is not, those two arguments are
automatically swapped, so that a nonempty range is always implied.
SELECT user_id
FROM user_logs
WHERE login_date BETWEEN '2014-02-01' AND '2014-03-01'
Between keyword works exceptionally for a date. it assumes the time is at 00:00:00 (i.e. midnight) for dates.
Read the documentation.
http://www.postgresql.org/docs/9.1/static/functions-datetime.html
I used a query like that:
WHERE
(
date_trunc('day',table1.date_eval) = '2015-02-09'
)
or
WHERE(date_trunc('day',table1.date_eval) >='2015-02-09'AND date_trunc('day',table1.date_eval) <'2015-02-09')
I would like to ask how do i check if the difference between two dates.
BillingDate which is a date type with an entry 'DD-MON-YYYY'
and the other date is the current date.
sys_date - BillingDate = daysFromBilled
alot of the examples i find they actually stated the second date to calculate the difference but what i am looking for is the difference between the current date so i can add it into a schedule or job.
i am using oracle btw.
Another point to add, i will continue to search, but if your could also recommend, how should i implement such a function:
Calculate date difference from all BillingDate entries
To trigger an alter table if the difference is more than 30 days to put Status as Late.
If Status is more than 60 days the Service attribute will be altered and changed to Cut
here is my rough table layout
Cust Billing
-------- ----------
CustID(PK) BillingID(PK)
LateStatus LateStatus
Service BillingDate
CustID
Thanks alot.
Update
REPLACE view DateDifference as
select trunc(sysdate)- trunc(BillingDate)
from Billing;
seems legit.
Simply subtract one date from the other:
BillingDate - sysdate
To do that in a select statement, just use it like this:
select billingdate - sysdate as daysFromBilled
from ...
Inside a trigger you use a regular assignment operator:
declare
daysFromBilled integer;
begin
daysFromBilled := :new.billingdate - sysdate;
...
that will return the number of days, including fractional values if the time is different (a DATE column in Oracle also contains a time!).
If you only want to get full days, use this:
trunc(BillingDate) - trunc(sysdate)
This statement of yours:
date type with an entry 'DD-MON-YYYY'
Indicates a misunderstanding on how DATE values work.
A DATE (or TIMESTAMP) does not have any format.
They are stored in binary form in your column. The format is only applied when you display the value and thus convert it to a character literal. That is the work of the client application you use to display the values. SQL*Plus uses the NLS settings, other SQL tools might use a different configuration.
All customers:
SELECT CUSTID
FROM BILLING
WHERE (SYSDATE - Billing_Date) >= 60
;
The following statement should update all the customer records where the difference is 60 days and over. Also, have added a clause to check if the service is already not set to CUT previously, so you don't end up updating the same records everytime.
UPDATE CUST_TABLE
SET SERVICE = 'CUT'
WHERE CustID in ( SELECT CustID
FROM BILLING_TABLE
WHERE (Sysdate - Billing_Date) >= 60
)
AND NVL(SERVICE, 'X') != 'CUT'
;