Comparing 2 Datetime Fields

Jan 17, 2002

I would like to compare 2 fields.. One of which is generated by the application upon insert. The other which is today's date.

In other words I want all records with today's date.

Problem is I get no results because I'm also apparently comparing the time.

Do I use a CONVERT function on my select & GETDATE outputs?

Thanks,
Kelly

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Comparing Datetime Fields

May 22, 2002

I have a table with a DateTime field that has Dates in the format of mm/dd/yyyy I want to do a simple count on the table for the previous day but keep getting 0 for the results. Here is the script I've been trying.

SELECT COUNT(*)
FROM mytbl
WHERE Collected_Date = DateAdd (dd, -1, GetDate())

It appears to me that the time portion of the DateAdd function keeps the matches that I am looking for from happening. What am I missing or am I going about this all wrong?

Thanks for any help

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Jun 15, 2004

I have the following SQL:

select convert(datetime,'04-20-' + right(term,4)) as dt,
'Deposit' as type, a.* from
dbo.status_view a

where right(term,4) always returns a string which constitutes a 4 digit year eg '1999','2004',etc.

The SQL above returns

2004-04-20 00:00:00.000 Deposit ...

Which makes me think that it is able to successfully construct the datetime object inline. But then when I try and do:

select * from
(
select convert(datetime,'04-20-' + right(term,4)) as dt,
'Deposit' as type, a.* from
dbo.status_view a
) where dt >= a.submit_date

I get the following error:

Syntax error converting datetime from character string.

Given that it executes the innermost SQL just fine and seems to convert the string to a datetime object, I don't see why subsequently trying to USE that datetime object for something (in this case comparison with submit_date which is a datetime in the table a) should screw it up. Help!!! Thanks...

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Apr 6, 2008

Hi all
I have a table with one nText Field , some times i need to realize whether two records have the same value in that nText Field or not , so how can i compare
these two records based on their ntext Fields.? in the other words i'm looking for some thing like the follows:
declare  @a nTextdeclare  @b nText
select @a=MynTextField from MyTable where PK=18select @b=MynTextField from MyTable where PK=21
if @a=@b  print 'Records Are the same'else print 'Record are not the same'
 
Thanks in advance.
Regards.
 
 
 
 

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Sep 1, 2000

I need to build a cube for membership over time. Active membership is the gap from the record's CreationDate to SuspendedDate, as compared to a reference date (today's active members have CreationDates before today, and SuspendedDates > today, or NULL).

Any idea how to build a cube so I can count membership over a Time dimension? The only approach I've been able to come up with is to create a table with a record for each active member on each date (brute force).

AtDhVaAnNkCsE!

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Aug 4, 2005

I am working with the article that MAK wrote on SecurityLogs http://www.databasejournal.com/features/mssql/article.php/3515886

I have completed this, but I have made some changes to the database (for normalization to 3NF purposes). I now have problems with a query.

I am trying to "Insert a new record in a table if it does not already exist in the table". To try to clarify I perform the following query:

INSERT INTO Tmp_Event
SELECT DISTINCT EventID, EventType, EventTypeName from Tmp

Which gives me the Tmp_Event table consisting of EventID's etc. (no duplicates). What I then want to do, is compare the 'Tmp_event' table and an already existing 'Event' table. These two tables are in fact identical. I would like to insert any records from 'Tmp_Event' into 'Event' if they do not already exist in 'Event'.

This query gives me all records that do not exist in 'Event'

SELECT EventID, EventType, EventTYpeName from Tmp_Event
WHERE EventID NOT IN (SELECT EventID from Event)

How can I change this query into performing an INSERT INTO Event as well?

Hope this makes sense :)

-Silia

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Nov 29, 2014

I have two name columns in my table, NAME1 & NAME2 that I want to compare to see if they match. Only problem is that the order of the first, last, middle name can be either same or different between the two fields.

For example
NAME1 = JAY JOHN SMITH
NAME2 = JOHN SMITH JAY or SMITH JOHN JAY

Is there a way to somehow reorder these fields and then compare using SQL?

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I want to do something like this.




Code SnippetSELECT * FROM [scholarship] WHERE ([schlrPrefix] + ' ' + [schlrName] AS ScholarshipName) LIKE 'Ann Buttler'





How do I something like this where it combines two fields and then use that to compare to a parameter?

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My situation is this: I have a requirement table,in the requirement table i have a field which is allow_multiple,if it allows multiple the value is 1 and 0 if it will not allow and also I have an insert storedprocedure for inserting licenses which will be added in the Staffl table.When i insert a new license for the staff,it should check in the requirement table if the new inserted lincense does have 0 or 1 value in the allow multiple field.If it has a value of 0 the new license should not be inserted.What would be the good way to compare the existing licenses of the staff and the newluy added?

Funnyfrog

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Nov 21, 2006

Hello friends,

I am trying to return all records between 2 dates. The Date columns are in DateTime format, and i am ignoring the timestamp. The user should be able to input UK Date Format (dd/mm/yyyy) and return the rows. This sql code works fine for American date format, but i get an error: converting from varchar to datetime when i put in a UK format. eg. 22/11/06. Please advise on this problem! many thanks!



ALTER PROCEDURE SalaryBetweenDates
(

@WeekStart datetime,

@WeekEnd datetime
)
AS


BEGIN
SET @WeekStart = (SELECT REPLACE(CONVERT(DATETIME,@WeekStart ,103),' ','-'))
SET @WeekEnd = (SELECT REPLACE(CONVERT(DATETIME,@WeekEnd ,103),' ','-'))
END


BEGIN
SELECT s.StaffNo,s.StaffName,s.StaffAddress, s.HourlyRate,
sh.HoursWorked, CONVERT(varchar(12), sh.WeekStart, 103) AS StartDate, CONVERT(varchar(12), sh.WeekEnd, 103)As EndDate,(sh.HoursWorked * s.HourlyRate)"Salary"
From Staff As S INNER JOIN StaffHours As Sh
On S.StaffNo = Sh.StaffNo
WHERE sh.WeekStart >= (@WeekStart)
AND sh.WeekEnd <= (@WeekEnd)

FOR XML RAW ('paySlip'), root('Staff'), ELEMENTS XSINIL
END


Return

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Comparing DateTime To UK Format

Nov 21, 2006

sorry folks the other message was on the wrong board!

Hello friends,

I
am trying to return all records between 2 dates. The Date columns are
in DateTime format, and i am ignoring the timestamp. The user should be
able to input UK Date Format (dd/mm/yyyy) and return the rows. This sql
code works fine for American date format, but i get an error:
converting from varchar to datetime when i put in a UK format. eg.
22/11/06. Please advise on this problem! many thanks!



ALTER PROCEDURE SalaryBetweenDates
(

@WeekStart datetime,

@WeekEnd datetime
)
AS


BEGIN
SET @WeekStart = (SELECT REPLACE(CONVERT(DATETIME,@WeekStart ,103),' ','-'))
SET @WeekEnd = (SELECT REPLACE(CONVERT(DATETIME,@WeekEnd ,103),' ','-'))
END


BEGIN
SELECT s.StaffNo,s.StaffName,s.StaffAddress, s.HourlyRate,
sh.HoursWorked,
CONVERT(varchar(12), sh.WeekStart, 103) AS StartDate,
CONVERT(varchar(12), sh.WeekEnd, 103)As EndDate,(sh.HoursWorked *
s.HourlyRate)"Salary"
From Staff As S INNER JOIN StaffHours As Sh
On S.StaffNo = Sh.StaffNo
WHERE sh.WeekStart >= (@WeekStart)
AND sh.WeekEnd <= (@WeekEnd)

FOR XML RAW ('paySlip'), root('Staff'), ELEMENTS XSINIL
END


Return

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Feb 22, 2008



Hi,
I have a varchar field named FinancialYTDCode containing data in the format 2007F or 2008F. I want to only select the rows with the FinancialYTDCode that is the same as the current year.

Could someone please show me how I write this in my script.
Thanks

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Dec 18, 2013

Is there a performance impact (if so, how great is it) when comparing a date to a datetime data type?

An educated guess suggests yes, as there will be a type casting... but then again I don't believe there's an issue when comparing an int to a tinyint and there's an assumption these would play by the same rules?

This has only come about because I'm considering changing the data type used in my standard calendar script and this popped in to my head.

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Oct 23, 2007



Can you compare chars stored as ccyymmdd correctly?

Field1>=field2

I was thinking you needed to cast this information as a datetime value before you could do it.

Thanks

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Jul 26, 2002

I am trying to join two tables and the datetime fields need to be part of the join. They contain times in the fields too. I just need them to join on the date part though. Is there maybe a way to just return the mm/dd/yyyy format and join on that? Any and all help is appreciated.

Thanks,
Chris

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Jul 20, 2005

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Hi,
When I try to insert a new record into a table that has a datetime field that allows nulls, a default 01/01/1900 date is inserted instead of null. I recreated the table and set the datatype to smalldatetime and I still get the error. What have I missed?

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Hi,We have a lame app that uses 2 datetime(8) fields, 1 stores the date, theother the time.example query:select aud_dt, aud_tmfrom ordersresults:aud_dt aud_tm2006-06-08 00:00:00.000 1900-01-01 12:32:26.287I'm trying to create a query that give me records from the current date inthe past hour.Here's a script that gives me todays date but I cannot figure out the time:select aud_dt, aud_tm, datediff(d,aud_dt,getdate()), datediff(mi, aud_tm,getdate())from orderswhere (datediff(d,aud_dt,getdate()) = 0)results:aud_dt aud_tmdatediff(0=today) timediff (since 1900-01-01)2006-06-08 00:00:00.000 1900-01-01 12:32:26.287 055978689I added this next part to the above query but it does not work since thedate/time is from 1900-01-01and (datediff(mi, aud_tm, getdate()) <= 60)Thanks for any help.

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Nov 12, 2007

I have a requirement to display the elapsed time between two datetime fields. What i have been able to do is datediff the dates and get the elapsed time in minutes and then i am trying to format it as HH:MM.

For example, an activity started on Nov 1 2007 08:00 and finished Nov 1 23:59, the elapsed time should be displayed as 15:59.

The other example is if the activity spans over a couple of days, it should be say 49:03.


I put the following code in the format of the textbox, but it only seems to work when the length of the minutes is greater than 1.


=IIF(Len(CStr(Fix(ReportItems!textbox11.Value/60)))= 1,

"0" + CStr(Fix(ReportItems!textbox11.Value/60)),

CStr(Fix(ReportItems!textbox11.Value/60)))

+ ":"

+ IIF(Len(CStr(Fix(ReportItems!textbox11.Value Mod 60)))= 1,

"0" + CStr(Fix(ReportItems!textbox11.Value Mod 60)),

CStr(Fix(ReportItems!textbox11.Value Mod 60)))


Have i missed something really simple or what? Any help would be much appreciated.

Alternatively, if you have a better way of doing the whole thing would like to hear from you.

Thanks in advance.

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Jun 21, 2006

Hi ,

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Best Regards,

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Dec 26, 2006

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Combine Separate Date &&amp; Time Fields Into One Datetime Field?

Dec 26, 2006

Good morning.

I am importing an XLS file into one of my tables. The fields are:

Date Id Time IO







12/22/2006
2
12:48:45 PM
9


12/22/2006
16
5:40:55 AM
1


12/22/2006
16
12:03:59 PM
2


When I do the import, I get the following:

Date Id Time IO
12/22/2006 12:00:00AM 2 12/30/1899 12:48:45 PM 2
12/22/2006 12:00:00AM 16 12/30/1899 5:40:55 AM 1
12/22/2006 12:00:00AM 16 12/30/1899 12:03:59 PM 2

Here are my doubts:

1. Is it be better to combine the Date & Time fields into one column? Advantages/Disadvantages?
2. If I don't combine them, should I use varchar or datetime data type?
2. What issues or problems might I have when I program SQL reports, if I leave the fields as they are?

Any comments or suggestions will be very much welcomed.

Cheers mates.

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sir

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my code like this


rs = New ADODB.Recordset

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Hi,
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SQL server table details
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columnname datatype
No int
date_t DateTime

C# coding
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