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### Using datediff to calculate elapsed time

Hi..my app requires an elapsed time calculation that I have done like thisCONVERT(Varchar, (DATEPART(dd, GETDATE() - DateAdded)-1) * 24 + DATEPART(hh,GETDATE() - DateAdded)) + 'h:' + CONVERT(Varchar, DATEPART(mi, GETDATE() - DateAdded)) + 'm' AS ElapsedTimeThis works.. I can then colour my grid view cells  accordingly using the substring function.. the problem is that I have been told that using GETDATE three times is not a good use of resources, is it possible to use the Datediff function to get the same result?thanksDan

### calculate between end time and start time workdays only

hi, i'm using the formula =DATEDIF([Start Time], [End Time],"d") to calculate the difference between 2 dates. now i need a formula that only calculate the workdays.

### Calculate Web Application Idle Time

Hi all,

I have a requirement to calculate the Web application idle time.

Say the user doesnt use the web application for 15 minutes, then a message needs to be displayed to the user.

How can this be done.

### How to calculate total hour and minutes within time range

I need to prepare a yearly management report to show the total overtime (OT) work hours and minutes of all staff within time range and month.

The time format in database is as follows:

Each record will contains the FROM date & time and TO date & time

The report layout is as follows:

I had no idea how to divide and calculate the total hours & minutes within the time range as each OT records will overlap several time range and date.

Joe

### Round off time to the nearest minute

How would you round this up to the nearest minute? There isn't a built in function to do this so you have to use a little bit of maths to get there. There are 60 seconds in a minute. We already have 38 seconds on the clock. So we need to add on 60 - 38 = 22 more seconds.

### Performance Tests: Precise Run Time Measurements with System.Diagnostics.Stopwatch

Everybody who does performance optimization stumbles sooner or later over the Stopwatch class in the System.Diagnostics namespace. And everybody has noticed that the measurements of the same function on the same computer can differ 25% -30% in run time. This article shows how single threaded test programs must be designed to get an accuracy of 0.1% - 0.2% out of the Stopwatch class. With this accuracy, algorithms can be tested and compared.

### Date and Time Functions in SQLSERVER

Date and time functions allow you to manipulate columns and variables with DATETIME and SMALLDATETIME data types.

1 DATEPART Function
2 DATENAME Function
3 DAY, MONTH, and YEAR Functions
4 GETDATE and GETUTCDATE Functions
6 DATEDIFF Function
7 More SQL Server Functions

### Data Types - Date and Time in SqlServer

Date and time values can be stored with either the DATETIME or SMALLDATETIME data type. The difference between the two is that SMALLDATETIME supports a smaller range of dates and does not give the same level of precision when accounting for time. The DATETIME data type can hold values from January 1st of 1753 to December 31st of 9999. The time is stored to the 1 three hundredths of a second and each value takes up 8 bytes of storage. The SMALLDATETIME data type can hold values between January 1st 1900 and June 6th of 2079. The time is tracked to the minute and each value takes up 4 bytes of storage. The majority of business applications can live happily with SMALLDATETIME, however, if you are in an environment where each second matters or you need to make estimates to the distant future (or past) then you have to resort to DATETIME. If you fail to specify the time when inserting a value into a DATETIME or SMALLDATETIME column, a default of midnight is used. If you fail to specify the date portion the default of January 1, 1900 is used.

### How to programmatically add controls to Windows forms at run time by using Visual C#

Create a Windows Forms Application
Start Visual Studio .NET or Visual Studio 2005 or a later version, and create a new Visual C# Windows Application project named WinControls. Form1 is added to the project by default.
Double-click Form1 to create and view the Form1_Load event procedure.
Add private instance variables to the Form1 class to work with common Windows controls. The Form1 class starts as follows:

### .NET 4 Web Application Startup Time

I was chatting with Jonathan Hawkins and some of the folks on the ASP.NET team about performance and Jonathan mentioned the startup time for large ASP.NET applications is improved on .NET 4. There are some improvements in the CLR and in ASP.NET itself that helped. If you have a giant app, you should do some tests.

### Built-in Functions - Date and Time Functions

Date and time functions allow you to manipulate columns and variables with DATETIME and SMALLDATETIME data types.

### Essential SQL Server Date, Time and DateTime Functions

The essential date and time functions that every SQL Server database should have to ensure that you can easily manipulate dates and times without the need for any formatting considerations at all.

### Date/Time Conversions Using SQL Server

There are many instances when dates and times don't show up at your doorstep in the format you'd like it to be, nor does the output of a query fit the needs of the people viewing it. One option is to format the data in the application itself. Another option is to use the built-in functions SQL Server provides to format the date string for you.

### Date and Time Data Types and Functions

The following sections in this topic provide an overview of all Transact-SQL date and time data types and functions. For information and examples that are common to date and time data types and functions

### Calculate distance, bearing and more between Latitude/Longitude points

This page presents a variety of calculations for latitude/longitude points, with the formulÃÂ¦ and code fragments for implementing them.

All these formulÃÂ¦ are for calculations on the basis of a spherical earth (ignoring ellipsoidal effects) - which is accurate enough* for most purposes. [In fact, the earth is very slightly ellipsoidal; using a spherical model gives errors typically up to 0.3% - see notes for further details].

### The Free Barcode Creator produces barcode images one at a time, and allows easy saving to a file or

The Free Barcode Creator produces barcode images one at a time, and allows easy saving to a file or pasting into an application. 2D versions are also available:

### How to calculate the distance between two points on the Earth

We offer many Global Database Products that you can use with the below formulas to calculate distances and many other uses. Not sure how to use distance calculations or global databases within your company? See our Global Database Examples for more information on how to use our data within your industry. Be sure to Download a Free Sample of one of our many Global Database Products.
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