MS SQL Comparison Between Two Date Values
Aug 25, 2007
I remember at some point I had some problem with this issue and I couldn't find something that suites a newbie.
The point that I was missing was that I couldn't pass the string representation of the date value to a query string. The key is to convert the string date to its equivalent datetime or smalldate .
For example imagine you'd like to select all Employees who where born on a specific date stored in a variable called myDate:
the BirthDay column in our Employee table has type smalldatetime
----------------------------------------------
string myDate = @"06/06/1978";
....
SqlCommand comm = new SqlCommand("SELECT * FROM EMPLOYEE WHERE [BirthDay] = Convert(smalldatetime,'" + myDate + "', 103))";
....
----------------------------------------------
Make suer that you don't miss single quotes around value of myDate in your query string.
For more info regrading the Convert function look at:
http://msdn2.microsoft.com/en-us/library/ms187928.aspx
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Jun 27, 2000
Hi...
I have a problem comparing dates in SQL Server 7.
I want to find results where date1 = date2.
I am having problems becausing SQL is also trying to compare the time which
is included in the field value e.g. 03/04/00 12:01:32
So even if the dates are equal the time may be different so the results are not shown?
I've tried SUBSTRING, and CONVERT,CAST etc.. and still can't get it to work
Any ideas???
Thanks.
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Oct 23, 2003
Good day,
I am receiving garbage data from my other department as follows.
I want:
'12/05/03' for example.
I get:
'//'
'00/00/00'
And other garbage. All of which crashes the transaction because it cannot be converted to Datetime.
What I would like to do is something like this:
IF @v_date > '01/01/50'
BEGIN <-- statement will crash if bad data)
Something to trigger a Boolean (True/False) validation of the data.
I want to know if it is even a date before I run it through my block.
Any thoughts?
I don't want to add a new IF block for every bizarre thing they send me.
Thanks ahead of time.
PS - I guess I could just raise an exception and handle it in a block that way, but am still curious.
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Dec 28, 2005
I have two tables that I am needing to link by the tables date field. In one table the date field is defined as varchar(23). The time for this field is always zeros.
Example: '2005-12-27 00:00:00.000'
The other table is defined as datetime, and it does have the date and time in this field.
Example: 2005-12-27 08:00:35.000
The problem i am having is
2005-12-27 00:00:00.000 does not = 2005-12-27 08:00:35.000.
Because I will never have more than one record on the same date I would like to be able to only compare the date. Example 2005-12-27 = 2005-12-27
Since the fields are 2 different field types, this is giving me a problem. Could someone please help. I have tried everything I know to do.
What I really need is the a way to format the datetime fields date into a string such as '2005-12-27'.
Hopefully what i have written makes sense.
Thanks
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Aug 22, 2012
I use the merge statement in a sproc to insert, update and delete records from a staging table to a production table.
In the long sql, here is a part of it,
When Matched and
((Student.SchoolID <> esis.SchoolID
OR
Student.GradeLevel <> esis.GradeLevel
OR
Student.LegalName <> esis.LegalName
OR
Student.WithdrawDate <> esis.WithdrawDate
Student.SPEDFlag <> esis.SPEDFlag
OR
Student.MailingAddress <> esis.MailingAddress)
Then update
Set Student.Schoolid=esis.schoolid,
.....
My question is how about if the column has null values in it.for example
if schoolID is null in production table is null, but in staging table is not null, will the <> return true.or if either side of <> has a null value, will it return true.
I don't want it to omit some records and causing the students records not get updated.If not return true, how to fix this?
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Nov 13, 2000
I'm having a problem with what should be a simple TSQL statement. I have a
table which has a datetime field updated. After the update if I type
select * from patient_medication where rec_status_date = '11/10/2000'
it returns the rows I want.(All the dates have a time of 00:00:00.000.
But if I type
select * from patient_medication where rec_status_date <> '11/10/2000'
or select * from patient_medication where rec_status_date != '11/10/2000'
The rows that have a value are returned, but none of the null values
are returned. Will nulls not work with this comparison?
Thanks
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Jul 31, 2006
In my current job I am learning MS SQL - while having to write valid SQL statements. I need some help designing a query that checks hire dates for establishing participation for (something).
So the statement establishing participation has to have a WHERE clause that will check HIRE_DATE and establish two different goals:
1. WHERE Hire_Date < OCTOBER 1 of this current year
2. WHERE Hire_Date < OCTOBER 1 of previous year
Different question now that I am thinking about it: some of these previous SQL statements have a @ symbol, what does that mean in SQL? Can't find an online resource that references that symbol
Example: IF @Type IN ('Workflow','All')
Thanks for the help in advance.
Rob
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Jul 20, 2005
HiI have a table that contains information that has start dates and enddates. They are stored in short date format.I have built a web page that initially returned all the information. Ithen want to return information spcific to todays date, where I useddim todDatetodDate = nowthen I didshTodDate = FormatDateTime(todDate, 2)which returned the date to a web page that was in the same format aswhat was in the access table.SELECT * from Events WHERE stDate = # ' & shTodDate & ' #;"This was fine beacuse it returned all events that started on that day.This doesn't help though because some events last a few days, so Itried the followingSELECT * FROM Events WHERE stDate >=#'&shTodDate&'# ANDendDate<=#'&shTodDate&'#;This still only returned events that started on the current day.Does anyone know how I can use <= or >= when comparing dates?ThankspuREp3s+
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Jul 20, 2005
Hi all,I am trying to create a stored procedure that will check a date field.I want to check for records that are equal to or greater then 90 daysfrom the current date. I am trying to check this against a fieldcalled LastUpdate. Is there an easy way in SQL to do this?TIA
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Jan 6, 2005
I have a stored procedure that is suppose to get all records that have an expiration date of today. My where clause is as follows:
Round2ExpDate <= getdate()
This is not working because of the time factore. What is the best way to truncate the time for each date? All recommendations are greatly appreciated.
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Mar 19, 2015
I am trying to use a date comparison in a statement using the year statement as well. Here is what I have:
Case [LastHireDate]
When YEAR([LastHireDate]) < Year(@EndYearlyDate) then '12'
When Month([LastHireDate]) = '1' then '12'
When Month([LastHireDate]) = '2' then '11'
When Month([LastHireDate]) = '3' then '10'
When Month([LastHireDate]) = '4' then '9'
[Code] ....
When I am looking at it [LastHireDate] is showing that red line underneath. The < symbol has a red line and @EndYearlyDate has a red line. I can not seem to get them to clear and am, wondering what I am missing. When I execute the error comes up that it does not like the < sign in there.
Here is the full piece that the Case resides in:
Insert _Test
SELECT
EmpNo,
PersonIdNo,
REPLACE(PersonTaxIdNo,'-',''),
LastName,
FirstName,
[code]......
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Jul 23, 2005
I have a datetime variable coming from my ASP.NET application that hasa time portion. I give my users the option to perform an equals,greater than, less than, or between comparison. The trouble comes inthe way the application builds the criteria string. The WHERE clausepassed in is in the format, "(start_dt = '2005/05/16 07:00:00.000')".What I want to do is only compare the date portion of start_dt to thedate portion of the passed in time. Manipulating the start_dt with thebuilt-in SQL functions isn't a problem, but altering the date passed infrom the ASP.NET would be a massive framework change in the app.Is there any way to only compare the date portions of both the SQLfield and the passed in value?Thanks.
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Oct 20, 2015
I need to take all records from table @A where ID = 1. Also i need to process the records with datewise from table @A. Here is the table structure
DECLARE @A TABLE (ID INT, ACCOUNT VARCHAR(10), EFFDT DATE)
INSERT INTO @A VALUES (1,'AAA','2015-10-01')
INSERT INTO @A VALUES (1,'BBB','2015-10-01')
INSERT INTO @A VALUES (1,'CCC','2015-10-01')
INSERT INTO @A VALUES (1,'AAA','2015-10-05')
INSERT INTO @A VALUES (1,'DDD','2015-10-01')
INSERT INTO @A VALUES (2,'AAA','2015-10-02')
INSERT INTO @A VALUES (2,'BBB','2015-10-02')
INSERT INTO @A VALUES (2,'CCC','2015-10-02')
INSERT INTO @A VALUES (2,'DDD','2015-10-02')
[code]...
how to achieve this in SQL query, i cannot use CTE or temp table as i need to use this code in another tool, it has to be single query, can use subquery or join would be better.
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Jun 9, 2014
I am having a problem in creating query for this exciting scenario.
Table A
ID ItemQtyCreatedDatetime
W001 CB112014-06-03 20:30:48.000
W002 CB112014-06-04 01:30:48.000
Table B
IDItemQtyCreatedDatetime
A001 CB112014-06-03 19:05:48.000
A002 CB112014-06-03 20:05:48.000
A003 CB112014-06-03 21:05:48.000
A004 CB112014-06-04 01:05:48.000
A005 CB112014-06-04 02:05:48.000
I would like to return the nearest date of Table B in my table like for
ID W001 in table B should return ID A002 CreatedDatetime: 2014-06-03 20:05:48.000
ID W002 in table B should return ID A004 CreatedDatetime: 2014-06-04 01:05:48.000
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Jan 13, 2015
I've got some records like this:
ID_________Jan Feb...........................Dec
0000030257 0 0 0 0 0 0 1 1 1 1 1 0
where each month field has a 0 or 1, depending on if the person was enrolled that month.
I'm being asked to generate a table like this:
ID_________ Start_Date End_Date
0000030257 July 1, 2014 Nov 30, 2014
Is there some slam dunk way to do this without a bunch of If/Then statements?
The editor compressed all my space fields, so the column headers are off in some places.
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Aug 27, 2015
I have a QA Deployment Date field that is being returned in a custom report I created. I also found a sample date range parameter:
What I want to accomplish:
I want to select a From and To Date and filter the report to only display the rows that have the QA Deployment Date within the selected range.
For example.. I want to select From Date (8/1/2105) and To Date (8/31/2015) and I only want to return only the results that have a QA Deployment date between that selected range.
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Jan 4, 1999
My process return a date in char format like "3/12/1998",
How could I put this data ( in char ) directly to date ISQ Server field ?
Thank's
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Aug 2, 2004
I'm stuck trying to compare date values from users selection against a database. I also need to add a condition statement on if the results return no match. How would I do that?
Also, I'm not even sure if my SELECT statement is right. The user will hit a date that will be in format m/d/yyyy and that will be compared to see if it exist in the database. The datebase column "date_created" is default with date/time( 8 ). But when I compare the to together, nothing returns back. The page loads successfully, but no results from the database.
Here is my code:
dim conpubs as sqlconnection
dim cmdSelectAuthors as sqlcommand
dim dtrAuthors As sqlreader
conpubs = New sqlconnection(configurationsettings.appSettings("STD"))
conpubs.open()
cmdSelectAuthors = New sqlcommand("Select * From HotNews WHERE date_created=" & y, conpubs)
dtrAuthors = cmdSelectAuthors.ExecuteReader()
Response.Write("<table><tr><td>")
While dtrAuthors.Read()
Response.Write(dtrAuthors("title") & "<br>")
End While
Response.Write("</td></tr></table>")
dtrAuthors.close()
conPubs.close()
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Aug 2, 2004
I'm stuck trying to compare date values from users selection against a database. I also need to add a condition statement on if the results return no match. How would I do that?
Also, I'm not even sure if my SELECT statement is right. The user will hit a date that will be in format m/d/yyyy and that will be compared to see if it exist in the database. The datebase column "date_created" is default with date/time( 8 ). But when I compare the to together, nothing returns back. The page loads successfully, but no results from the database.
Here is my code:
dim conpubs as sqlconnection
dim cmdSelectAuthors as sqlcommand
dim dtrAuthors As sqlreader
conpubs = New sqlconnection(configurationsettings.appSettings("STD"))
conpubs.open()
cmdSelectAuthors = New sqlcommand("Select * From HotNews WHERE date_created=" & y, conpubs)
dtrAuthors = cmdSelectAuthors.ExecuteReader()
Response.Write("<table><tr><td>")
While dtrAuthors.Read()
Response.Write(dtrAuthors("title") & "<br>")
End While
Response.Write("</td></tr></table>")
dtrAuthors.close()
conPubs.close()
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May 8, 2001
Hi , I need to compare two date fields in two different tables.One of the field is varchar(8) and other is dateime.When there is a date in one field and NULL in other field , how do I compare these two vales?
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Jun 30, 2000
I would like some suggestions on how to keep from displaying the value "1/1/1900" on my asp pages when my recordset field returns a Sql date value that is null
Thanks for any tips
Jim
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Aug 26, 2015
I have two tables.
Emp:
id | Deptno | sdate | edate | locid
1 | 10 |2014-09-19 |2009-09-25 | 100
1 | 10 |2014-11-06 |2009-11-06 | 100
1 | 10 |2014-12-11 |2014-12-14 | 100
1 | 10 |2009-07-01 |2009-07-20 | 100
2 | 20 |2007-07-11 |2007-07-17 | 104
Empl1:
Id | Deptno | edate | refid | refid1
1 | 10 | 2014-11-06 | 201 | 204
1 | 10 | 2014-12-13 | 204 | 202
1 | 10 | 2014-12-12 | 207 | 124
1 | 10 | 2003-05-04 | 105 | 103
2 | 20 | 2007-07-14 | 102 | 106
I am trying to combine these two tables into the output below:
Id | Deptno | locid | current_refid | current_refid1 | last_refid | last_refid1
1 | 10 | 101 | 201 | 204 | 204 |202
2 | 20 | 104 | 102 | 106 | 102 |106
The tables share the common columns id and deptno. To get the above result, the emp1.edate must be between emp.sdate and emp.edate.
If that condition is met, we need to retrieve the refid and refid1 values corresponding to the lowest edate as last_refid and last_refid1. Then we need the refid and refid1 values corresponding to the emp1.edate between emp.stdate and emp.edate to be retrieved as the current_refid and current_ refid1.
select a.id,a.deptno,a.locid,b.refid,b.refid1
from
emp b
[code]...
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May 31, 2008
I have a table with date like this.
InstId--Date----Readings
--1---10/12/2008--10
--1---11/12/2008--10
--1---12/12/2008--10
--1---13/12/2008--9
--1---14/12/2008--10
--1---15/12/2008--10
--1---16/12/2008--10
--1---17/12/2008--10
--2---05/03/2008--8
--2---06/03/2008--6
--2---07/03/2008--8
--2---08/03/2008--8
--2---09/03/2008--8
--2---20/03/2008--8
Guys I want to get the date ranges instrument wise for which the instrument readings are constant.
For example for instrument 1 the readings are constant i.e 10 from 10/12/2008
till 12/12/2008 & then again it is constant from 14/12/2008 till 17/12/2008.
Same goes for instrument id 2.It is constant from 07/03/2008 till 20/03/2008.
I need to get the output like this.
StartDate EndDate Readings
10/12/2008 12/12/2008 10
14/12/2008 17/12/2008 10
17/03/2008 20/03/2008 8
Thanks for any help.
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Apr 15, 2015
I have a columns with datatype varchar(50) which has date values in it.
I am trying to convert the values in the column to a date value,but i am getting conversion error.
Msg 241, Level 16, State 1, Line 1
Conversion failed when converting date and/or time from character string.
select last_update from importtest where convert(datetime,last_update)<convert(datetime,'24 Dec 2014')
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May 7, 2015
I want to count the values of 2 field on particular date
I have user table with 3 field
1.from_userid
2.to_userid
3.Date
Now i want to count the no. of files from_userid have send, no. of files to user_id have received on particular day. The data is like this
From_userid to_userid date
3953 6274 10/22/2014
3953 6152 10/22/2014
1112 2710 10/22/2014
3953 1851 10/23/2014
3953 4302 10/23/2014
4302 2710 10/23/2014
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Jul 20, 2005
How do I order a query by a date field ASC, but have any NULL valuesshow up last? i.e.7/1/20037/5/20037/10/2003<NULL><NULL>Any help will greatly be appreciated
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Feb 22, 2007
Would like to restrict the dates users can put as parameters. For example, I have a report showing all orders in year 2007. I have exposed Start Date and End Date parameters. When users click the 'View Report' button, the report will filter for orders where attribute EnteredDate is >= Start Date and <= End Date.
I want to restrict the users from entering a start date greater than today's date. Would also like to restrict them from entering an end date that is less than the start date parameter. How can I do this?
TIA.
ElSalsero
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Feb 19, 2008
Hi,
In my Excel file, The Application date column contains empty for some rows. In SSIS I am using one Data Conversion to that Application Date column to change it as Date[dt_Date]. This data conversion is giving error Conversion failed. In Sqlserver table, I declare ApplicationDate column datatype as DateTime.
I want to keep those empty date values as Null in Sqlserver.
I tried the IMEX=1 property still it is not working. How to solve this error?
Thanks in advance.
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Mar 20, 2008
I am attempting to create search parameters for a gridview control and I am experiencing a small issue. When I get to a date parameter I am unable to display null values.
I setup a sqldatasource and created the parameters below to handle the selections for minimum date required and the maximum date required for the date columns in the database. The problem is I do not know how to display null dates.
Is there a way to incorporate something into the search page to show null dataes?
Sql Where Clause 1 WHERE (LSS_Requests.TypeCode = @TypeCode) AND (LSS_Requests.PersonNo LIKE '%' + @PersonNo + '%') AND
2 (LSS_Requests.TicketNo LIKE '%' + @TicketNo + '%') AND (LSS_Requests.Name LIKE '%' + @Name + '%') AND
3 (LSS_Requests.RequestName LIKE '%' + @RequestName + '%') AND (LSS_Requests.RequiredDate >= @Fromrequireddate) AND
4 (LSS_Requests.RequiredDate <= @ToRequiredDate) AND (LSS_Requests.OriginationDate >= @SearchFromOriginationDate) AND
5 (LSS_Requests.OriginationDate <= @SearchToOriginationDate) AND (LSS_Requests.LastUpdated >= @SearchFromUpdatedDate) AND
6 (LSS_Requests.LastUpdated <= @SearchUpdatedToDate) AND (LSS_Users_1.userFullName LIKE @SearchDDLUsers) AND
7 (LSS_Users.userFullName LIKE @SearchddlCIAsignee) AND (LSS_Requests.TypeCode = 'CC') AND (LSS_lu_Status.stNm LIKE '%' + @StatusName + '%')
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Apr 13, 2007
Null date values within a table in SQL Server are displays as (12/30/1899) by Report Builder. Does anyone know how to display the null value as blank?
Thanks in advance
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Mar 11, 2008
Hi,
I have a calendar parameter in one of my reports. The values of the calendar are of the form 'yyyy-mm-dd hh:mms'. And they are string values.
Now when I generate the report I have a textbox that takes the parameter label (e.g., parameter!calendar.label). However, I would like to format (or trim) the label as just 'yyyy-mm-dd'. Does anyone know how I can do this? I tried to change the parameter value format to datetime but this just throws an invalid datatype error...
cheers,
Al
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Jul 25, 2006
I am using a DAL and i want to insert a new row where one of the columns is DATE and it can be 'NULL'.
I am assigning SqlTypes.SqlDateTime.Null.
But when the date is saved in the database, i get the minvalue (1/01/1900) . Is there a way to put the NULL value in the database using DAL????how can i put an empty date in the database?
THANK YOU!!!
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Mar 17, 2008
I want to have a FromDateTextBox and a ToDateTextBox where the user can enter in dates (most likely in mm/dd/yy format, although intelligently handing other formats might be a plus). Then I want to use these dates as the basis for a WHERE clause like:<some sql...> WHERE start_date BETWEEN 'FromDateTextBox.Text' AND 'ToDateTextBox.Text' (Note this WHERE clause will be used as the basis for an SqlDataSource FilterExpression). 1. I believe the date strings need to be in the format 'yyyy-mm-dd' to search SQL server is this correct?2. What's a decent way to convert the strings from the textboxes to the required format?3. How can I avoid an SQL injection attack?
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