date column - datetime type.
My query is:
select * from car_db.car_parts where date::text LIKE '2018-07-06%'
How i select where date <= 'YEAR-MONTH-DAY', and ignore time?
I will be grateful...
First, Postgres doesn't offer a datetime type. The type is called timestamp. Also, Postgres has the very convenient function date_trunc(), so you can use that:
select *
from car_db.car_parts
where date_trunc('day', date) = '2018-07-06'::date;
However, this method -- or any method with a functional call or type conversion -- can affect index usage. I strongly recommend:
where date >= '2018-07-06'::date and
date < '2018-07-07'::date
Try the following. Also, you should not name your column as date.
select * from car_db.car_parts where cast("date" as date) < '2018-07-06'
Related
I'm trying to make a query that makes me able to select just the data from the current month from a table, the date field that I'm using as reference is Datetime Type (e.g 2021-02-19 03:23:31), this field is called "Date". My try is this as follow:
Select *
FROM CORP.T_LOGI_RN_Planeacion_Entregas
Where Cast(CORP.T_LOGI_RN_Planeacion_Entregas.Date As Date) >= Cast(Month(getdate()) As Date)
It's not working, (im not pretty sure if I need to use "Cast" Actually) it throws me this error:
Cannot cast type int to date
But using something like this where I'm not specifying the Month, it works:
Select *
FROM CORP.T_LOGI_RN_Planeacion_Entregas
Where Cast(CORP.T_LOGI_RN_Planeacion_Entregas.Date As Date) >= Cast(getdate() As Date)
Any idea?
Thanks by the way and sorry if the solution is so obvious I'm little bit new on this, best regards.
Since you have not specified your DB Product but from your syntax It seems SQL Server. YOu can use MONTH function here -
Select *
FROM CORP.T_LOGI_RN_Planeacion_Entregas
Where MONTH(CORP.T_LOGI_RN_Planeacion_Entregas.Date) = MONTH(GETDATE())
AND YEAR(CORP.T_LOGI_RN_Planeacion_Entregas.Date) = YEAR(GETDATE());
I'm looking to add in a condition to my already badly performing SQL code. I want to add in a filter where the date = yesterday (data type as INT).
For example
Select *
From table
Where Date = 20190930
How do I do this using GETDATE() - 1?
We need to be very clear about what data type you're using.
If you have a simple date value (no time component as part of the data type), things are pretty easy:
Select *
from table
where Date = DATEADD(day, -1, cast(current_timestamp as date))
If you have a DateTime or DateTime2 value, it's important to understand that all DateTime values have a time component that goes all the way down to milliseconds. This is true even when you expect the time component to always be at or near midnight. That can make straight equality comparisons difficult. Instead, you almost always need check within a specific range:
Select *
from table
where Date >= DATEADD(day, -1, cast(current_timestamp as date))
AND Date < cast(current_timestamp as date)
Here's your query.
Firstly, you need to cast your int date to a varchar before covenrting to datetime, to avoid an arithmetic flow error during conversion.
Secondly, you need to cast getdate() - 1 as date to truncate time to match your date field.
select *
from table
where cast((cast(date as varchar(8))as datetime) = cast(getdate() - 1 as date)
or
select *
from table
where cast((cast(date as varchar(8)) as date) = cast(dateadd(day,datediff(day,1,GETDATE()),0) as date)
I can not convert this query from oracle to posgresql. Any help would be appreciated.
Select tdcollid, tddate, tdentry, tdlng, tdlat, tdvpid
From Tracking where Tdcollid = 'jperez'
And Trunc(Tddate) = Trunc(To_Date('14-DEC-16','yyyy-MM-DD'))
order by Tddate
You can do:
Select tdcollid, tddate, tdentry, tdlng, tdlat, tdvpid
From Tracking
where Tdcollid = 'jperez' And
ttdate >= '2016-12-14'::date and
ttdate < '2016-12-14'::date + interval '1 day'
order by Tddate;
Note that the date comparisons are arranged so they can use an index (if appropriate). You can use the same logic as ttdate::date = '2016-12-14'::date if this is not a concern.
Try something like this:
SELECT tdcollid, tddate, tdentry, tdlng, tdlat, tdvpid
FROM tracking
WHERE tdcollid = 'jperez'
AND tddate::date = '2016-12-14'::date
ORDER BY tddate
If tddate is a timestamp, casting it to date with ::date will do the same as Oracle's TRUNC(timestamp). Also date constants should be preferably in ISO-8601 format.
I would like to select all the records in a table between two dates. I have a query like:
SELECT * FROM <table> WHERE (thedate BETWEEN DATE('2012-04-01') AND DATE('2012-06-30'))
This is fine for HSQL, Oracle, PostgreSQL, but it doesn't work in SQL Server due to the lack of the Date function. Is there a way to get this to work generally for all databases (including SQL Server) or do I need to use an ORM like Hibernate (I know I should, but I'm specifically asking if this can be done in SQL)?
There's no need for the Date(...) as far as i can tell. This example seems to work
DECLARE #TheDate Date = '2012-07-01';
SELECT 'hello' WHERE (#TheDate BETWEEN '2012-04-01' AND '2012-06-30')
--None returned
SET #TheDate = '2012-05-01'
SELECT 'hello' WHERE (#TheDate BETWEEN '2012-04-01' AND '2012-06-30')
--selects hello
Edit Btw worth looking at This Question with the date time answer (will post here just to save effort)
The between statement can cause issues with range boundaries for dates as
BETWEEN '01/01/2009' AND '01/31/2009'
is really interpreted as
BETWEEN '01/01/2009 00:00:00' AND '01/31/2009 00:00:00'
so will miss anything that occurred during the day of Jan 31st. In this case, you will have to use:
myDate >= '01/01/2009 00:00:00' AND myDate < '02/01/2009 00:00:00' --CORRECT!
or
BETWEEN '01/01/2009 00:00:00' AND '01/31/2009 23:59:59' --WRONG! (see update!)
UPDATE: It is entirely possible to have records created within that last second of the day, with a datetime as late as 01/01/2009 23:59:59.997!!
For this reason, the BETWEEN (firstday) AND (lastday 23:59:59) approach is not recommended.
Use the myDate >= (firstday) AND myDate < (Lastday+1) approach instead.
in sql-server I think you may want to look into the
DATEADD ( datepart , number, date )
DATEDIFF ( datepart , startdate , enddate )
but I think you're looking for
CAST ( expression AS data_type )
or
CONVERT ( data_type [ ( length ) ] , expression [ , style ] )
usage:
Select * from myTable where thedateToCompare >= CONVERT ( datetime , "dd/mm/yy hh:mi:ss:mmmAM" ) and thedateToCompare <= CONVERT ( datetime , "dd/mm/yy hh:mi:ss:mmmAM" )
something that may change your approach is weather your source 'thedate' column type datetime, smalldatetime or is it stored in a column defined as string?
You may want to check out a link! for more detial on datetime constants that you could use for your string variations.
I have datecreated field in a table. It contains value as "2009-12-30 11:47:20:297"
I have a query like this:
select *
from table
where DateCreated = getdate()
Although one row exists with today's date, I am not getting that row while executing above query. Can anybody help?
The reason why your query doesn't return the row you expect, is because GETDATE() returns the date and time portion at the moment the query was executed. The value in your DateCreated column will not match the time portion, so no rows are returned.
There are various ways to construct a query so that it evaluates the date based on only the date component. Here's one example:
WHERE YEAR(datecreated) = YEAR(GETDATE())
AND MONTH(datecreated) = MONTH(GETDATE())
AND DAY(datecreated) = DAY(GETDATE())
The unfortunate reality is that any query using a function on the column means that if an index exists on the column, it can't be used.
You can use something like this with Sql Server
CREATE FUNCTION [dbo].[udf_DateOnly](#DateTime DATETIME)
RETURNS DATETIME
AS
BEGIN
RETURN DATEADD(dd,0, DATEDIFF(dd,0,#DateTime))
END
This line
DATEADD(dd,0, DATEDIFF(dd,0,#DateTime))
will strip out the Date portion.
The datetime field includes both the date and the time, accurate to the millisecond. Your query will only work if it is the exact millisecond stored in the database.
To check if it is today, but ignore the time of day, you can check for a range like this:
select * from table where
DateCreated >= '2009-12-30' and
DateCreated < '2009-12-31'
You can use that in conjunction with a function that converts the current date, as astander or Khilon has posted. Here is a full example using astander's answer. Also, as Craig Young points out, this will work with indexes.
select * from table where
DateCreated >= DATEDIFF(dd,0,GETDATE()) and
DateCreated < DATEDIFF(dd,0,GETDATE())
The simplest solution might be :
SELECT CAST(GETDATE() as DATE)
You can convert datetime to a string with only the date by using
CONVERT(varchar(8), GETDATE(), 112)
If needed, you can then change it back to datetime and as a result you'll get a datetime with the hours, minutes, seconds and milliseconds set to zero.