I am having trouble with the following simple query
SELECT * FROM users WHERE Created = '28/02/2013'
The issue is the column CREATED is a datetime datatype, so the query executes fine as long as the timestamp is 0:00:0, if the time stamp is set to say 12:00, then the query does not return a result set.
Any idea why?
Thanks
Because you are not specifying the time, so it assumes that you are doing:
SELECT * FROM users WHERE Created = '28/02/2013 00:00:00'
If you want the whole day, then you need a range of times:
SELECT *
FROM users
WHERE Created >= '20130228' AND Created < '20130301'
Also, please use non ambiguous format for dates ('YYYYMMDD') instead of other formats.
SELECT * FROM users WHERE CAST(Created AS DATE) = '28/02/2013'
will fix it, but be careful, it disables indexes
SELECT * FROM users WHERE Created BETWEEN '28/02/2013 00:00' AND '28/02/2013 23:59'
And this will use index
If you don't need to consider time: try to convert created field to date and then compare as;
SELECT * FROM users WHERE convert(date,Created) = '28/02/2013'
--this would be even better with iso date format (not culture specific)
SELECT * FROM users WHERE convert(date,Created) = '20130228' --yyyymmdd format
You have to convert the column into date and then compare
SELECT * FROM users WHERE CONVERT(VARCHAR(11), Created, 106) = '28 Feb 2013'
Related
I have a table with one column dateX formatted as datetime and containing standard dates.
How can I select all records from this table where this dateX equals a certain date, e.g. May 9, 2014 ?
I tried the following, but this returns nothing even if I have several records with this date.
SELECT *
FROM dbo.LogRequests
WHERE (CONVERT(VARCHAR(10), dateX, 101) = '09/05/14')
Edit: In the database the above example looks as follows, using SQL 2012: 2014-05-09 00:00:00.000
The easiest way is to convert to a date:
SELECT *
FROM dbo.LogRequests
WHERE cast(dateX as date) = '2014-05-09';
Often, such expressions preclude the use of an index. However, according to various sources on the web, the above is sargable (meaning it will use an index), such as this and this.
I would be inclined to use the following, just out of habit:
SELECT *
FROM dbo.LogRequests
WHERE dateX >= '2014-05-09' and dateX < '2014-05-10';
For Perfect DateTime Match in SQL Server
SELECT ID FROM [Table Name] WHERE (DateLog between '2017-02-16 **00:00:00.000**' and '2017-12-16 **23:59:00.999**') ORDER BY DateLog DESC
SELECT *
FROM LogRequests
WHERE cast(dateX as date) between '2014-05-09' and '2014-05-10';
This will select all the data between the 2 dates
Ii have values stored in the SQL Server in the following manner : 02-Jul-12 12:00:00 AM here the time and minutes, seconds can be anything like 02-Jul-12 12:15:52 PM ,02-Jul-12 6:02:12 AM so on.
I want to have a where condition which will omit the time and take the data based on the date like the following where some_Date='02-Jul-12'
How would I do this?
SELECT * FROM whatever WHERE some_Date LIKE '02-Jul-12%';
If you are on SQL2008 or later, you can cast your DATETIME to DATE.
See this post: http://blog.sqlauthority.com/2012/09/12/sql-server-get-date-and-time-from-current-datetime-sql-in-sixty-seconds-025-video/
But in a WHERE-clause it is better to search between dates, like this:
DECLARE #startDate DATETIME = '02-Jul-2012'
DECLARE #endDate DATETIME = DATEADD(DAY, 1, #startDate)
SELECT * FROM [table] WHERE [some_Date] BETWEEN #startDate AND #endDate
SELECT * FROM dbo.tbl_MyTable
WHERE
REPLACE(CONVERT(VARCHAR(9), DateTimeValueColumn, 6), ' ', '-')='02-Jul-12'
or
On chage in code is instead of using getdate function voncert you datestring in datetime format and do compare this follow query will work for you
SELECT * FROM dbo.tbl_MyTable
WHERE
CAST(CONVERT(CHAR(10), DateTimeValueColumn, 102) AS DATE) =
CAST(CONVERT(CHAR(10),GETDATE(),102) AS DATE)
If you are storing dates as characters -- which is not recommended -- you should at least use ISO format: YYYY-MM-DD hh:mm:ss. This makes the date useful for sorting and comparisons ("<" works, ">" works, "between" works as well as equals).
To extract the date, you can then use left(datestr, 10). In your format, you would use:
where left(datestr, 9) = '01-Jan-13'
If you are storing the fields as a datetime or smalldatetime, you may think they are stored as a string. They are not. They are stored as some number of days since some particular date, with day parts stored as fractional days. If you are using SQL Server 2005 or greater, then the best way is:
where cast(datetime as date) = '2013-01-01' -- I recommend ISO formats, even for constants. '20130101' is even better
To select rows with today's date (not time)
select * from myTable where datediff(dd, dateColumn, getdate()) = 0
I have a couple of questions in regards to dates in SQL Server.
How do I separate a datetime value "2011-08-10 14:56:17.267" into date and timestamp in two separate columns. Eg. Date "2011-08-10" and timestamp "14:56:17"
I want remove the timestamp from datetime value into "2011-08-10" and still be able to order the data by date (therefore not converted to varchar). Also is there away to change the date value as '10 Aug 2011' and still can sort (not alphabetically but in real date order).
Thank you,
HL
For the first one:
UPDATE atable
SET
DateColumn = CAST(DateTimeColumn AS date),
TimeColumn = CAST(DateTimeColumn AS time)
As for the second one, date display format is something that is unrelated to the date value. You can order the result set by your date column, but in the SELECT clause you can use CONVERT to display the date in the desired format. For example:
SELECT
CONVERT(varchar, DateColumn, 106) AS Date,
…
FROM atable
ORDER BY DateColumn
use CONVERT function with parameters from resource http://www.mssqltips.com/tip.asp?tip=1145
-- simple conversion example:
SELECT CONVERT(VARCHAR(10), GETDATE(), 102) -- for date
SELECT CONVERT(VARCHAR(10), GETDATE(), 8) -- for time
Suppose I have a date 2010-07-29. Now I would like to check the result of one day ahead. how to do that
For example,
SELECT *
from table
where date = date("2010-07-29")
How to do one day before without changing the string "2010-07-29"?
I searched and get some suggestion from web and I tried
SELECT *
from table
where date = (date("2010-07-29") - 1 Day)
but failed.
MySQL
SELECT *
FROM TABLE t
WHERE t.date BETWEEN DATE_SUB('2010-07-29', INTERVAL 1 DAY)
AND '2010-07-29'
Change DATE_SUB to DATE_ADD if you want to add a day (and reverse the BETWEEN parameters).
SQL Server
SELECT *
FROM TABLE t
WHERE t.date BETWEEN DATEADD(dd, -1, '2010-07-29')
AND '2010-07-29'
Oracle
SELECT *
FROM TABLE t
WHERE t.date BETWEEN TO_DATE('2010-07-29', 'YYYY-MM-DD') - 1
AND TO_DATE('2010-07-29', 'YYYY-MM-DD')
I used BETWEEN because the date column is likely DATETIME (on MySQL & SQL Server, vs DATE on Oracle), which includes the time portion so equals means the value has to equal exactly. These queries give you the span of a day.
If you're using Oracle, you can use the + and - operators to add a number of days to a date.
http://psoug.org/reference/date_func.html
Example:
SELECT SYSDATE + 1 FROM dual;
Will yield tomorrow's date.
If you're not using Oracle, please tell use what you ARE using so we can give better answers. This sort of thing depends on the database you are using. It will NOT be the same across different databases.
Depends of the DateTime Functions available on the RDBMS
For Mysql you can try:
mysql> SELECT DATE_ADD('1997-12-31',
-> INTERVAL 1 DAY);
mysql> SELECT DATE_SUB('1998-01-02', INTERVAL 31 DAY);
-> '1997-12-02'
If youre using MSSQL, you're looking for DateAdd() I'm a little fuzzy on the syntax, but its something like:
Select * //not really, call out your columns
From [table]
Where date = DateAdd(dd, -1, "2010-07-29",)
Edit: This syntax should be correct: it has been updated in response to a comment.
I may have the specific parameters in the wrong order, but that should get you there.
In PL SQL : select sysdate+1 from dual;
How can I select 12/20/2008 in where clause of sql?
The server is SQL server 2005.
select * from tblErrorLog
where errorDate = '12/20/2008'
WHERE datetime_column >= '20081220 00:00:00.000'
AND datetime_column < '20081221 00:00:00.000'
First of all, I'd recommend using the ISO-8601 standard format for date/time - it works regardless of the language and regional settings on your SQL Server. ISO-8601 is the YYYYMMDD format - no spaces, no dashes - just the data:
select * from tblErrorLog
where errorDate = '20081220'
Second of all, you need to be aware that SQL Server 2005 DATETIME always includes a time. If you check for exact match with just the date part, you'll get only rows that match with a time of 0:00:00 - nothing else.
You can either use any of the recommend range queries mentioned, or in SQL Server 2008, you could use the DATE only date time - or you could do a check something like:
select * from tblErrorLog
where DAY(errorDate) = 20 AND MONTH(errorDate) = 12 AND YEAR(errorDate) = 2008
Whichever works best for you.
If you need to do this query often, you could either try to normalize the DATETIME to include only the date, or you could add computed columns for DAY, MONTH and YEAR:
ALTER TABLE tblErrorLog
ADD ErrorDay AS DAY(ErrorDate) PERSISTED
ALTER TABLE tblErrorLog
ADD ErrorMonth AS MONTH(ErrorDate) PERSISTED
ALTER TABLE tblErrorLog
ADD ErrorYear AS YEAR(ErrorDate) PERSISTED
and then you could query more easily:
select * from tblErrorLog
where ErrorMonth = 5 AND ErrorYear = 2009
and so forth. Since those fields are computed and PERSISTED, they're always up to date and always current, and since they're peristed, you can even index them if needed.
You don't say which database you are using but in MS SQL Server it would be
WHERE DateField = {d '2008-12-20'}
If it is a timestamp field then you'll need a range:
WHERE DateField BETWEEN {ts '2008-12-20 00:00:00'} AND {ts '2008-12-20 23:59:59'}
Assuming we're talking SQL Server DateTime
Note: BETWEEN includes both ends of the range, so technically this pattern will be wrong:
errorDate BETWEEN '12/20/2008' AND '12/21/2008'
My preferred method for a time range like that is:
'20081220' <= errorDate AND errordate < '20081221'
Works with common indexes (range scan, SARGable, functionless) and correctly clips off midnight of the next day, without relying on SQL Server's time granularity (e.g. 23:59:59.997)
Use a convert function to get all entries for a particular day.
Select * from tblErrorLog where convert(date,errorDate,101) = '12/20/2008'
See CAST and CONVERT for more info
select * from tblErrorLog
where errorDate BETWEEN '12/20/2008' AND DATEADD(DAY, 1, '12/20/2008')
Use below query for clear understanding
/****** Script for SelectTopNRows command from SSMS ******/
SELECT *
FROM [dbo].[PublishedInfo]
where PublishedDate >= '2022-02-14T11:31:16.5299166+00:00'