I have a table which has list of some events with dates. I am trying to write a stored procedure that will return only the upcoming events.
I have written the following query in the stored procedure:
SELECT *
FROM Events
WHERE tDate >= (select CAST(GETDATE() as DATE))
But this is not returning correct result. This is also showing results that have dates less than current date. How to write a query that will return all the events that have date equal or greater than today's date.
Edit: Dates that have been entered on the table have the format yyyy/dd/mm and getdate() returns date in the format yyyy/mm/dd. I think this is causing the problem. Dates that have been entered into the table has been taken using jquery date picker. Any solution to this problem?
Not sure why you have an additional select
SELECT *
FROM Events
WHERE tDate >= CAST(GETDATE() as DATE)
your DATE data is incorrectly stored within Sql Server. When your application passes the string '2015-09-04' and you save that your date column, it is saved as 4th Sept 2015 and not 9th April 2015. Hence your query returns such rows as they are greater than GETDATE().
Example
DECLARE #D VARCHAR(10) = '2015-09-04'
SELECT CONVERT(VARCHAR(20),CONVERT(DATE,#D),109)
you need to fix your data and then use a CONVERT with style when saving dates in your table from application, using something like this. CONVERT(DATE, '20150409',112)
DECLARE #D VARCHAR(10) = '20150409'
SELECT CONVERT(VARCHAR(20),CONVERT(DATE,#D,112),109)
Refer these threads for more info:
Impossible to store certain datetime formats in SQL Server
Cast and Convert
Related
I am trying to create a view on a table called petients in my database. The table has five columns. One of them is the column which I want to keep patient admitted date. It data type is datetime so I want to create a query that filters the data in this table based on current date. For example I want create a view that shows only details of petients who have been recorded on the current day.
Here is my code:
CREATE VIEW [dbo].[recent petients]
AS
SELECT petient_id, name, age, contact
FROM [petients]
WHERE [date] = 'date.Today'
I am getting an error saying that failed to convert date to string. Can you help me to solve it, or where is my code wrong?
Your code looks like SQL Server code. If so, I would recommend:
SELECT petient_id, name, age, contact
FROM [patients]
WHERE [date] = CONVERT(date, GETDATE());
As a note: This version is much better than DATEDIFF() because it allows the use of an index on patient([date]).
If the "date" column has a time component, you can use:
WHERE CONVERT(date, [date]) = CONVERT(date, GETDATE())
Note that this is also index-safe in SQL Server.
I'm assuming you are using Transact-SQL from Microsoft SQL Server, but you should specify the sql dialect you are using.
Since the datetime field type generally includes also a time, it is better to use the DATEDIFF function: https://learn.microsoft.com/it-it/sql/t-sql/functions/datediff-transact-sql?view=sql-server-ver15
In your case, to consider only the record where date=today, the difference in days must be zero:
--SQL QUERY
WHERE DATEDIFF(day, GETDATE(), [date]) = 0
day identifies the element you want to consider the difference. A list of names or abbreviations can be found in the link
GETDATE() returns now datetime
2nd and 3rd arguments are the dates you want to make the difference between
I want to query a datetime field using a range of dates provided in the format DD/MM/YYYY.
I know that to convert datetime to a DD/MM/YYYY format that I can use:
CONVERT(CARCHAR(10), ORDERDATE,103)`
And this works fine when querying a single date, eg:
SELECT DISTINCT
CONVERT(DATE, ORDERDATE),
CONVERT(CARCHAR(10), ORDERDATE,103)
FROM ORDERS
WHERE CONVERT(CARCHAR(10), ORDERDATE,103) = '19/10/2017'
Returns: 2017-10-19, 19/10/2017
However it does not work on a range of dates, eg:
WHERE CONVERT(CARCHAR(10), ORDERDATE,103) BETWEEN '17/10/2017' AND '19/10/2017'
Returns:
2014-02-05
2016-12-12
2013-04-30
I know there are hundreds of threads about SQL dates, but they all seem to be regarding reformatting the output and not preparing the input. Do I need to reformat my DD/MM/YYYY inputs?
To query a range of dates, use the DATE-datatype instead of VARCHAR.
If datatype of column ORDERDATE is DATETIME:
WHERE CONVERT(DATE, ORDERDATE) BETWEEN
CONVERT(DATE, '17/10/2017', 103) AND CONVERT(DATE, '19/10/2017', 103)
The conversion of ORDERDATE is only necessary if the start and end date are the same. (in this case, when no conversion is done, only dates with a time value of '00:00:00.000' will be returned)
EDIT:
To omit the conversion of ORDERDATE you can add the time to the dates and convert them to DATETIME instead of DATE, like this:
WHERE ORDERDATE BETWEEN
CONVERT(DATETIME, '19/10/2017 00:00:00') AND CONVERT(DATETIME, '19/10/2017 23:59:59.999');
Or even simpler, like suggested in #Used_By_Already's answer:
WHERE ORDERDATE >= '20171017' AND ORDERDATE < '20171020' --Note the end date is here +1 day
SQL Server date information should NOT be stored "in a format". If if they are literally stored in that format then they are NOT dates as far as the database is concerned (they are "strings" that look like dates) and you will have a nightmare to deal with if they are DD/MM/YYYY because they simply will not behave like dates should.
There are several specific data types in SQL Server for date/time information (datetime, datetime2, smalldatetime, date, time) but ALL of these do not store data in a human readable format at all. Instead they stored as groups of numbers, which will be displayed in a human readable manner, and in your case - by default - you are seeing then in DD/MM/YYYY format. A user in China might prefer to see a date in YYYY.MM.DD or in the USA as MM/DD/YYYY. This is possible because a human format is applied on top of the numbers that are stored before they get displayed.
So. In SQL Server there is a "safe" date literal in the form of 'YYYYMMDD' and this may be used without the need to CONVERT or CAST:
IF your [ORDERDATE] column is a date (or smalldatetime/datetime/datetime2) then this will work:
WHERE ORDERDATE BETWEEN '20171017' AND '20171019'
OR, you may explicitly convert a string to but you need a "style number" to be present to make these fully reliable. Style 103 for example is for DD/MM/YYYY
WHERE ORDERDATE BETWEEN CONVERT(date, '17/10/2017',103) AND CONVERT(date, '19/10/2017',103)
Although "between" has been used in the discussion above a far more reliable method of forming date ranges is to NOT use "between", instead do it this way:
WHERE ORDERDATE >= '20171017' AND ORDERDATE < '20171020'
With this pattern (note the second day is now +1) it does not matter which date precision is stored in the column. For example, see Bad habits to kick : mis-handling date / range queries
I want to impose date condition on a date time field in SQL Server.
The datetime field is like this 2011-01-19 17:57:18.350 and when I execute below query it yields no results.
select top 1000 *
from [dbo].[RouteState]
where convert (date, logtime, 101) = '12-01-2015'
Can someone help me what's going wrong here?
There is no need to convert the datetime column to anything. Use a closed-open interval instead and change the format of your string literal to yyyymmmdd to make sure that SQL Server will interpret the date value in the same way regardless of regional and date format settings.
select top 1000 *
from [dbo].[RouteState]
where logtime >= '20150112' and
logtime < '20150113';
For more info on casting a column to date you can have a look at Cast to date is sargable but is it a good idea?
I'm trying to retrieve records by comparing date values as follows :
declare #fromdate as date
declare #todate as date
set #fromdate='2013-04-01'
set #todate='2013-04-13'
select createdon,
convert(varchar,PhoneCall.createdon,101) as createdon,
convert(varchar,#fromdate,101) as fromdate
from
PhoneCall
where convert(varchar,PhoneCall.createdon,101) >= convert(varchar,#fromdate,101) and convert(varchar,PhoneCall.createdon,101) <= convert(varchar,#todate,101)
There is something wrong in the comparison, I've tried using various conversion formats but I'm not receiving correct results.
The query above has been my latest trial, although it looks correct, it doesn't take into account the comparison of the Year. So the results displayed are as follows:
Createdon ConvertedCreatedOn ConvertedFromDate
2013-05-08 14:13:16.000 05/08/2013 05/01/2013
2014-05-01 17:10:03.000 05/01/2014 05/01/2013
EDIT:
This is a query I'll use for a report. The #fromdate and #todate are report parameters that will be entered manually by the user, so I have to make sure that they're in the same format with the database date format.
Why do you convert all DATE fields/params to VARCHAR? Just use DATE comparison:
where PhoneCall.createdon BETWEEN #fromdate AND #todate
IF you NEED to use varchar then you should use 102 format (yyyy.mm.dd) instead of 101 (mm/dd/yyyy). In this case it can be used to compare dates as strings.
I am pretty new to SQL and hope someone here can help me with the following:
I have a table in SQL Server with one column storing dates and I have a simple stored procedure to select data from this table.
Currently it fetches the date including hours and minutes.
How can I achieve that it fetches the date in format yyyy-mm-dd (without the hours and minutes) ?
My column is called "logDate" and my table is called "logTable".
Thanks for any help with this, Tim
If you only want to store the date, convert the column to a date type, not a datetime.
If you want to keep the date and time in the data, but just display the date
select convert(date, logDate) from logTable
If you want to return the date as a string, use convert
select convert(varchar(10), logDate, 120) from logTable