I am having trouble getting records out of a database for a certain date. This this the SQL command I have at the moment:
SELECT * FROM ict1 WHERE date='26/03/1992'
It should return one record from my database. "date" is a column and one of the records has '26/03/1992' as the value. I have tested the db connection and I can use:
SELECT * from ict1
So I know it's not that. It's probably just the SQL syntax being a lot different, I'm used to MySQL :#)
Should probably mention that I'm using .NET with an OleDbConnection.
Thanks.
Usually dates need to be formatted as for access like the following
Select * from ict1 where date= #03/26/1992#
The # denotes a date in access.
Be very careful with dates formatted as '10/03/1992' as it could mean 10th of march or 3rd of october depending on where you are.
Also #1992/03/26# also works
You may want to use a date comparison function instead of date = #xxxx/xx/xx#. Date comparisons do not yield expected results because of formatting and data type issues. In SQL Server your date might be stored as a datetime or a date data type. You need to make sure you are comparing things in the same type and format.
DateDiff ("d", #1992/03/26#, date) = 0
Use the date as YYYY/MM/DD format:
SELECT * FROM ict1 WHERE date='1992/03/26'
SELECT * FROM ict1 WHERE date=#1992/03/26#
Related
Basically my date in MySql table looks like this
2001-04-16
The format is actually day-month-year. Unfortunately 20 is added to the date. So finally i should update this date. This should become
01-04-2016
How to update my all date format in my table
Don't change this in the database, change it when you need to display it. The ISO date format is what's used internally and should be kept that way, it's the most native, efficient format, and it sorts correctly.
You can select them out:
SELECT DATE_FORMAT(date_column, '%d-%m-%Y') FROM table_name
Using the DATE_FORMAT() function.
Even better is to do this in your application layer, whatever that is, using a date formatting function tuned to the user's locale.
If you've got a bunch of bad data in your database you need to convert, you can re-write it with the DATE_FORMAT() function to strip out the mistakes.
For example:
UPDATE table_name SET date_column=DATE_FORMAT('20%d-%m-%y', date_column)
For mysql, MySQL retrieves and displays DATE values in 'YYYY-MM-DD' format. so you can fetch date in whatever format you want from database, please see https://dev.mysql.com/doc/refman/5.6/en/datetime.html for more info.
you can use DATE_FORMAT() function :
SELECT DATE_FORMAT('%d-%m-%Y', date) as desired_date FROM table_name where 1
I'm using Access DB 2007 - 2010; I've tried to import many CSV files but the timestamp column keeps failing to import correctly.
So I linked all of the CSV's to an Access DB and I'm trying to query all of the tables.
I'm trying to extract the year and day of the year from the time stamp (which is currently a string)
I'm trying to combine the Format with datepart functions and it keeps failing. (it just says error in the table)
The format function by itself works but I can't combine it with anything.
I'm basically trying to do this:
select datepart("y", Format(gmt, "dd-mmm-yyyy hh:nn:ss")) as DOY from Table1;
but it fails. I've also tried CDate and DateValue in different combinations but it all fails.
Does anyone know how to get this to work?
UPDATE
The format function isn't doing anything. The text remains the same no matter how I try to format it.
Here's a datetime sample: 05-Dec-2008 13:40:01.955
Access can't cope with the milliseconds in your date strings.
Use Left() to exclude them and feed the resulting substring to CDate().
SELECT CDate(Left(gmt, 20)) AS date_from_string
FROM Table1;
Once you have a valid Date/Time value, you can use Year(<Date/Time value>) or DatePart("yyyy", <Date/Time value>) to extract the year. And DatePart("y", <Date/Time value>) will give you the day of the year.
Just solve this issue, here is my code for your reference:
update tablename
set date=cdate(format(left(gmt,4)&"-"&right(gmt,2),"yyyy-mm"))
The main problem is, that I have stored in database datetime , not the date (what I need). Ok never mind.
I have thousands of reports stored each day.
I need to LEFT by 10 my datetime_view (to cut the time) and everything's fine. Except this. I'm trying to figure out why do I have to put in the condition + one day from the future? Otherwise it won't search what I want.
SELECT
LEFT(datetime_view,10),
count(type)
FROM reports
WHERE
type IN (1,2,5)
AND
datetime_view>='2012-10-28'
AND
datetime_view<='2012-11-04'
group by LEFT(datetime_view,10);
You can see I must search from the future. Why??
It gives me an output from 28.10 to 3.11 ....
don't use string operations on date/time values. MySQL has a huge set of functions for date/time manipulation. Try
GROUP BY DATE(datetime_view)
instead, which will extract only the date portion of the datetime field. Your string operation is not y10k compliant. Using the date() function is.
As for your plus one day, consider how the comparisons are done: A plain date value, when used in date/time comparisons, has an implicit 00:00:00 time value attached to it, e.g. all dates have a time of "midnight".
i think it's better to use DATE(datetime_view) to cut the time instead of LEFT(datetime_view,10), also on the where condition:
DATE(datetime_view) <= '2012-11-03'
I have a MySQL-table in which I store, among other things, dates in a normal "date" field. Some dates however are incomplete with either the day or both the day and month missing, substituted with double zeroes, which I believe is the "mysql way to do it". Some examples:
2007-04-03 - 3 April 2007
2006-03-00 - Mars 2006
2008-00-00 - 2008
Only problem is, when I try to receive dates that are "incomplete" with double zeros in classic asp, it won't output it since it won't recognize it as either a date or string.
What I'd like to do is simply this, outputting the date just like a string:
Set RecSet = Connect.Execute("SELECT * FROM mytable")
Response.Write RecSet("mydate")
Set RecSet = nothing
I know that I might solve this easily by simply changing the field from date to varchar, but I don't know if there's any side effects to this, like problems when comparing dates in varchar-fields with dates in dates-fields, or comparing varchar-dates with eachother in the SQL query.
Therefore I'd like to keep storing my dates in a date-field, but since I can't output them I have a problem.
So, anyone know how I can handle (partially) zero-dates in ASP?
You could just replace the 00s with 01s in your select statement:
SELECT REPLACE(date_column,'-00','-01') AS formatted_date
FROM mytable
I have a column that uses time stamp. My question is I am a bit confused about how to make queries against it,how would I say
Where $time is after X date
Are queries made in local time or CUT?
When I just try to do where andthe post date /time I get an error because of the space and if I quote it I think it takes it as a string : /
What format do I use for the date in the WHERE clauss !?!?
You can use the normal logical comparisons, for example:
SELECT * FROM table WHERE date >= '2010-01-31'
SELECT * FROM table WHERE date >= '2010-01-31 12:01:01'
Time is generally in your current local time, but you can run the query "SELECT CURTIME()" to check. Also, make sure you have the year-month-date in the right order... that can cause issues.
The manual has more details:
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html
Assuming you talk about TIMESTAMP column type (not Unix timestamp) the format is either 'YYYY-MM-DD HH:MM:SS' (quoted) or YYYYMMDDHHMMSS
Atually, in the first case you can use any spearators you wish (or none), only numbers are taken into ccount