Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

sql 2005 where clause with smalldatetime

Posted on 2015-02-05
4
Medium Priority
?
351 Views
Last Modified: 2015-02-06
I have a sql 2005 database that has a smalldatetime field.  I am creating an asp.net application with vb.net code behind that will return a dataset from that table and fill a grid.  On my form there is a data picker.  When you select a date from the date picker it should return all records from the table that have the selected date.  The date picker returns a date in this format..
mm/dd/yyyy  here is the query I am working on but cant figure out how to get it to work... This is one of many different way I have tried...any help would be great - Todays_Date is the field with smalldatetime data type - in the example below I am just plugging in any date that is formatted how the date picker would

SELECT     KEYField, GUID, FKEYEmployee, RadioEntity, FKEYRadio_Number, Todays_Date, TimeOut, TimeIn, Location, Note, EnteredBY, EnteryTime, Status, 
                      FKEYTract, Check_Out_By, Check_Out_Time, Check_In_By, Check_In_Time
FROM         [tblCheckIn-Out]
WHERE     (TO_CHAR(Todays_Date, 'MM/DD/YYYY') = '2 / 4 / 2015')

Open in new window

0
Comment
Question by:David Modugno
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 12

Expert Comment

by:Habib Pourfard
ID: 40592933
The following query will work if you pass '02/04/2015' instead of '2 / 4 / 2015':

SELECT     KEYField, GUID, FKEYEmployee, RadioEntity, FKEYRadio_Number, Todays_Date, TimeOut, TimeIn, Location, Note, EnteredBY, EnteryTime, Status, 
                      FKEYTract, Check_Out_By, Check_Out_Time, Check_In_By, Check_In_Time
FROM         [tblCheckIn-Out]
WHERE     CONVERT(char(10), Todays_Date, 101) = '02/04/2015'

Open in new window

0
 
LVL 49

Accepted Solution

by:
PortletPaul earned 2000 total points
ID: 40592956
For best performance you should avoid applying functions on each row of data to achieve a filter. Plus it is better to avoid the data type conversion from smalldatetime as well.

So, Instead of moving each and every row of data into a varchar in the format mm/dd/yyyy,
alter your single parameter into 2 smalldatetime values like this:

WHERE (
                [Todays_Date] >= convert(smalldatetime, @your_param, 101)
        AND
                [Todays_Date] < DATEADD(day,1, convert(smalldatetime, @your_param, 101) )
             )

This is known as using SARGable predicates.

The SQL may look more complex, but it will be faster.

Note: Please do NOT use "between", see: "Beware of Between"
0
 

Author Closing Comment

by:David Modugno
ID: 40594176
Thanks for the help.. it worked perfectly
0
 
LVL 49

Expert Comment

by:PortletPaul
ID: 40594880
Excellent! Thanks for the feedback. Cheers, Paul
0

Featured Post

Veeam Task Manager for Hyper-V

Task Manager for Hyper-V provides critical information that allows you to monitor Hyper-V performance by displaying real-time views of CPU and memory at the individual VM-level, so you can quickly identify which VMs are using host resources.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the first part of this tutorial we will cover the prerequisites for installing SQL Server vNext on Linux.
In part one, we reviewed the prerequisites required for installing SQL Server vNext. In this part we will explore how to install Microsoft's SQL Server on Ubuntu 16.04.
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed
Suggested Courses

604 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question